- home
- Advanced Search
- Energy Research
- Energy Research
description Publicationkeyboard_double_arrow_right Article , Journal 2013 PortugalPublisher:Springer Science and Business Media LLC Authors: Carvalho, Carlos Manuel Ferreira; Lavareda, Guilherme; Amaral, Ana; Carvalho, Carlos Nunes de; +1 AuthorsCarvalho, Carlos Manuel Ferreira; Lavareda, Guilherme; Amaral, Ana; Carvalho, Carlos Nunes de; Paulino, Nuno Filipe Silva Veríssimo;handle: 10400.21/4783
This paper presents a micro power light energy harvesting system for indoor environments. Light energy is collected by amorphous silicon photovoltaic (a-Si:H PV) cells, processed by a switched capacitor (SC) voltage doubler circuit with maximum power point tracking (MPPT), and finally stored in a large capacitor. The MPPT fractional open circuit voltage (VOC) technique is implemented by an asynchronous state machine (ASM) that creates and dynamically adjusts the clock frequency of the step-up SC circuit, matching the input impedance of the SC circuit to the maximum power point condition of the PV cells. The ASM has a separate local power supply to make it robust against load variations. In order to reduce the area occupied by the SC circuit, while maintaining an acceptable efficiency value, the SC circuit uses MOSFET capacitors with a charge sharing scheme for the bottom plate parasitic capacitors. The circuit occupies an area of 0.31 mm2 in a 130 nm CMOS technology. The system was designed in order to work under realistic indoor light intensities. Experimental results show that the proposed system, using PV cells with an area of 14 cm2, is capable of starting-up from a 0 V condition, with an irradiance of only 0.32 W/m2. After starting-up, the system requires an irradiance of only 0.18 W/m2 (18 μW/cm2) to remain operating. The ASM circuit can operate correctly using a local power supply voltage of 453 mV, dissipating only 0.085 μW. These values are, to the best of the authors' knowledge, the lowest reported in the literature. The maximum efficiency of the SC converter is 70.3 % for an input power of 48 μW, which is comparable with reported values from circuits operating at similar power levels.
Repositório Científi... arrow_drop_down Repositório Científico do Instituto Politécnico de LisboaArticle . 2014Analog Integrated Circuits and Signal ProcessingArticle . 2013 . Peer-reviewedLicense: Springer TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/s10470-013-0222-8&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eumore_vert Repositório Científi... arrow_drop_down Repositório Científico do Instituto Politécnico de LisboaArticle . 2014Analog Integrated Circuits and Signal ProcessingArticle . 2013 . Peer-reviewedLicense: Springer TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/s10470-013-0222-8&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Part of book or chapter of book , Conference object , Article 2013 Portugal, FrancePublisher:Springer Berlin Heidelberg Authors: Carvalho, Carlos; Paulino, Nuno;handle: 10400.21/2777
A voltage limiter circuit for indoor light energy harvesting applications is presented.This circuit is a part of a bigger system, whose function is to harvest indoor light energy, process it and store it, so that it can be used at a later time. This processing consists on maximum power point tracking (MPPT) and stepping-up, of the voltage from the photovoltaic (PV) harvester cell. The circuit here described, ensures that even under strong illumination, the generated voltage will not exceed the limit allowed by the technology, avoiding the degradation, or destruction, of the integrated die. A prototype of the limiter circuit was designed in a 130 nm CMOS technology. The layout of the circuit has a total area of 23414 μm2. Simulation results, using Spectre, are presented.
Hyper Article en Lig... arrow_drop_down Repositório Científico do Instituto Politécnico de LisboaConference object . 2013INRIA a CCSD electronic archive serverConference object . 2013License: CC BYData sources: INRIA a CCSD electronic archive serverMémoires en Sciences de l'Information et de la CommunicationConference object . 2013License: CC BYhttps://doi.org/10.1007/978-3-...Part of book or chapter of book . 2013 . Peer-reviewedData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/978-3-642-37291-9_47&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eumore_vert Hyper Article en Lig... arrow_drop_down Repositório Científico do Instituto Politécnico de LisboaConference object . 2013INRIA a CCSD electronic archive serverConference object . 2013License: CC BYData sources: INRIA a CCSD electronic archive serverMémoires en Sciences de l'Information et de la CommunicationConference object . 2013License: CC BYhttps://doi.org/10.1007/978-3-...Part of book or chapter of book . 2013 . Peer-reviewedData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/978-3-642-37291-9_47&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Book 2016 PortugalPublisher:Springer International Publishing Authors: Carvalho, Carlos Manuel Ferreira; Paulino, Nuno Filipe Silva Veríssimo;handle: 10400.21/6130
This book discusses in detail the CMOS implementation of energy harvesting. The authors describe an integrated, indoor light energy harvesting system, based on a controller circuit that dynamically and automatically adjusts its operation to meet the actual light circumstances of the environment where the system is placed. The system is intended to power a sensor node, enabling an autonomous wireless sensor network (WSN). Although designed to cope with indoor light levels, the system is also able to work with higher levels, making it an all-round light energy harvesting system. The discussion includes experimental data obtained from an integrated manufactured prototype, which in conjunction with a photovoltaic (PV) cell, serves as a proof of concept of the desired energy harvesting system. © 2016 Springer International Publishing. All rights are reserved.
Repositório Científi... arrow_drop_down https://doi.org/10.1007/978-3-...Book . 2016 . Peer-reviewedLicense: Springer Nature TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/978-3-319-21617-1&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eumore_vert Repositório Científi... arrow_drop_down https://doi.org/10.1007/978-3-...Book . 2016 . Peer-reviewedLicense: Springer Nature TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/978-3-319-21617-1&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Part of book or chapter of book , Conference object , Article 2016 FrancePublisher:Springer International Publishing Authors: Carvalho, Carlos; Paulino, Nuno;This paper presents an overview of the PhD thesis “CMOS indoor light energy harvesting system for wireless sensing applications”, whose main goal was designing a micro-power light energy harvesting system for indoor scenarios, addressing the challenges associated with this kind of environment. Light energy was taken in by using an amorphous silicon (a-Si) photovoltaic (PV) cell and conditioned using a switched-capacitor (SC) voltage converter, along with a maximum power point tracking (MPPT) capability. The MPPT method was the Fractional VOC, put into practice by using an asynchronous state machine (ASM) which automatically establishes and controls the clock signals’ frequency, thus controlling the switches of the voltage converter. To minimize the area of the SC section, MOSFET capacitors were used. A charge reusing scheme was proposed, so as to decrease the loss through the parasitic capacitance of their bottom plate. Laboratorial results, taken from a CMOS solid-state prototype, show that the proposed system can achieve better results than those in the present state of the art.
Hyper Article en Lig... arrow_drop_down Hyper Article en LigneConference object . 2016License: CC BYFull-Text: https://hal.inria.fr/hal-01438242/documentData sources: Hyper Article en Lignehttps://hal.inria.fr/hal-01438...Part of book or chapter of bookLicense: CC BYData sources: UnpayWallINRIA a CCSD electronic archive serverConference object . 2016License: CC BYData sources: INRIA a CCSD electronic archive serverMémoires en Sciences de l'Information et de la CommunicationConference object . 2016License: CC BYhttps://doi.org/10.1007/978-3-...Part of book or chapter of book . 2016 . Peer-reviewedLicense: Springer TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/978-3-319-31165-4_19&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eumore_vert Hyper Article en Lig... arrow_drop_down Hyper Article en LigneConference object . 2016License: CC BYFull-Text: https://hal.inria.fr/hal-01438242/documentData sources: Hyper Article en Lignehttps://hal.inria.fr/hal-01438...Part of book or chapter of bookLicense: CC BYData sources: UnpayWallINRIA a CCSD electronic archive serverConference object . 2016License: CC BYData sources: INRIA a CCSD electronic archive serverMémoires en Sciences de l'Information et de la CommunicationConference object . 2016License: CC BYhttps://doi.org/10.1007/978-3-...Part of book or chapter of book . 2016 . Peer-reviewedLicense: Springer TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/978-3-319-31165-4_19&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Part of book or chapter of book , Conference object , Article 2011 France, PortugalPublisher:Springer Berlin Heidelberg Authors: Carvalho, Carlos; Lavareda, Guilherme; Paulino, Nuno;handle: 10400.21/2063
A DC-DC step-up micro power converter for solar energy harvesting applications is presented. The circuit is based on a switched-capacitor voltage tripler architecture with MOSFET capacitors, which results in an area approximately eight times smaller than using MiM capacitors for the 0.13μm CMOS technology. In order to compensate for the loss of efficiency, due to the larger parasitic capacitances, a charge reutilization scheme is employed. The circuit is self-clocked, using a phase controller designed specifically to work with an amorphous silicon solar cell, in order to obtain the maximum available power from the cell. This will be done by tracking its maximum power point (MPPT) using the fractional open circuit voltage method. Electrical simulations of the circuit, together with an equivalent electrical model of an amorphous silicon solar cell, show that the circuit can deliver a power of 1132 μW to the load, corresponding to a maximum efficiency of 66.81%.
Hyper Article en Lig... arrow_drop_down Hyper Article en LigneConference object . 2011License: CC BYFull-Text: https://hal.inria.fr/hal-01566570/documentData sources: Hyper Article en LigneRepositório Científico do Instituto Politécnico de LisboaArticle . 2012INRIA a CCSD electronic archive serverConference object . 2011License: CC BYData sources: INRIA a CCSD electronic archive serverMémoires en Sciences de l'Information et de la CommunicationConference object . 2011License: CC BYhttps://doi.org/10.1007/978-3-...Part of book or chapter of book . 2011 . Peer-reviewedData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/978-3-642-19170-1_56&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eumore_vert Hyper Article en Lig... arrow_drop_down Hyper Article en LigneConference object . 2011License: CC BYFull-Text: https://hal.inria.fr/hal-01566570/documentData sources: Hyper Article en LigneRepositório Científico do Instituto Politécnico de LisboaArticle . 2012INRIA a CCSD electronic archive serverConference object . 2011License: CC BYData sources: INRIA a CCSD electronic archive serverMémoires en Sciences de l'Information et de la CommunicationConference object . 2011License: CC BYhttps://doi.org/10.1007/978-3-...Part of book or chapter of book . 2011 . Peer-reviewedData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/978-3-642-19170-1_56&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu
description Publicationkeyboard_double_arrow_right Article , Journal 2013 PortugalPublisher:Springer Science and Business Media LLC Authors: Carvalho, Carlos Manuel Ferreira; Lavareda, Guilherme; Amaral, Ana; Carvalho, Carlos Nunes de; +1 AuthorsCarvalho, Carlos Manuel Ferreira; Lavareda, Guilherme; Amaral, Ana; Carvalho, Carlos Nunes de; Paulino, Nuno Filipe Silva Veríssimo;handle: 10400.21/4783
This paper presents a micro power light energy harvesting system for indoor environments. Light energy is collected by amorphous silicon photovoltaic (a-Si:H PV) cells, processed by a switched capacitor (SC) voltage doubler circuit with maximum power point tracking (MPPT), and finally stored in a large capacitor. The MPPT fractional open circuit voltage (VOC) technique is implemented by an asynchronous state machine (ASM) that creates and dynamically adjusts the clock frequency of the step-up SC circuit, matching the input impedance of the SC circuit to the maximum power point condition of the PV cells. The ASM has a separate local power supply to make it robust against load variations. In order to reduce the area occupied by the SC circuit, while maintaining an acceptable efficiency value, the SC circuit uses MOSFET capacitors with a charge sharing scheme for the bottom plate parasitic capacitors. The circuit occupies an area of 0.31 mm2 in a 130 nm CMOS technology. The system was designed in order to work under realistic indoor light intensities. Experimental results show that the proposed system, using PV cells with an area of 14 cm2, is capable of starting-up from a 0 V condition, with an irradiance of only 0.32 W/m2. After starting-up, the system requires an irradiance of only 0.18 W/m2 (18 μW/cm2) to remain operating. The ASM circuit can operate correctly using a local power supply voltage of 453 mV, dissipating only 0.085 μW. These values are, to the best of the authors' knowledge, the lowest reported in the literature. The maximum efficiency of the SC converter is 70.3 % for an input power of 48 μW, which is comparable with reported values from circuits operating at similar power levels.
Repositório Científi... arrow_drop_down Repositório Científico do Instituto Politécnico de LisboaArticle . 2014Analog Integrated Circuits and Signal ProcessingArticle . 2013 . Peer-reviewedLicense: Springer TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/s10470-013-0222-8&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eumore_vert Repositório Científi... arrow_drop_down Repositório Científico do Instituto Politécnico de LisboaArticle . 2014Analog Integrated Circuits and Signal ProcessingArticle . 2013 . Peer-reviewedLicense: Springer TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/s10470-013-0222-8&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Part of book or chapter of book , Conference object , Article 2013 Portugal, FrancePublisher:Springer Berlin Heidelberg Authors: Carvalho, Carlos; Paulino, Nuno;handle: 10400.21/2777
A voltage limiter circuit for indoor light energy harvesting applications is presented.This circuit is a part of a bigger system, whose function is to harvest indoor light energy, process it and store it, so that it can be used at a later time. This processing consists on maximum power point tracking (MPPT) and stepping-up, of the voltage from the photovoltaic (PV) harvester cell. The circuit here described, ensures that even under strong illumination, the generated voltage will not exceed the limit allowed by the technology, avoiding the degradation, or destruction, of the integrated die. A prototype of the limiter circuit was designed in a 130 nm CMOS technology. The layout of the circuit has a total area of 23414 μm2. Simulation results, using Spectre, are presented.
Hyper Article en Lig... arrow_drop_down Repositório Científico do Instituto Politécnico de LisboaConference object . 2013INRIA a CCSD electronic archive serverConference object . 2013License: CC BYData sources: INRIA a CCSD electronic archive serverMémoires en Sciences de l'Information et de la CommunicationConference object . 2013License: CC BYhttps://doi.org/10.1007/978-3-...Part of book or chapter of book . 2013 . Peer-reviewedData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/978-3-642-37291-9_47&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eumore_vert Hyper Article en Lig... arrow_drop_down Repositório Científico do Instituto Politécnico de LisboaConference object . 2013INRIA a CCSD electronic archive serverConference object . 2013License: CC BYData sources: INRIA a CCSD electronic archive serverMémoires en Sciences de l'Information et de la CommunicationConference object . 2013License: CC BYhttps://doi.org/10.1007/978-3-...Part of book or chapter of book . 2013 . Peer-reviewedData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/978-3-642-37291-9_47&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Book 2016 PortugalPublisher:Springer International Publishing Authors: Carvalho, Carlos Manuel Ferreira; Paulino, Nuno Filipe Silva Veríssimo;handle: 10400.21/6130
This book discusses in detail the CMOS implementation of energy harvesting. The authors describe an integrated, indoor light energy harvesting system, based on a controller circuit that dynamically and automatically adjusts its operation to meet the actual light circumstances of the environment where the system is placed. The system is intended to power a sensor node, enabling an autonomous wireless sensor network (WSN). Although designed to cope with indoor light levels, the system is also able to work with higher levels, making it an all-round light energy harvesting system. The discussion includes experimental data obtained from an integrated manufactured prototype, which in conjunction with a photovoltaic (PV) cell, serves as a proof of concept of the desired energy harvesting system. © 2016 Springer International Publishing. All rights are reserved.
Repositório Científi... arrow_drop_down https://doi.org/10.1007/978-3-...Book . 2016 . Peer-reviewedLicense: Springer Nature TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/978-3-319-21617-1&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eumore_vert Repositório Científi... arrow_drop_down https://doi.org/10.1007/978-3-...Book . 2016 . Peer-reviewedLicense: Springer Nature TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/978-3-319-21617-1&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Part of book or chapter of book , Conference object , Article 2016 FrancePublisher:Springer International Publishing Authors: Carvalho, Carlos; Paulino, Nuno;This paper presents an overview of the PhD thesis “CMOS indoor light energy harvesting system for wireless sensing applications”, whose main goal was designing a micro-power light energy harvesting system for indoor scenarios, addressing the challenges associated with this kind of environment. Light energy was taken in by using an amorphous silicon (a-Si) photovoltaic (PV) cell and conditioned using a switched-capacitor (SC) voltage converter, along with a maximum power point tracking (MPPT) capability. The MPPT method was the Fractional VOC, put into practice by using an asynchronous state machine (ASM) which automatically establishes and controls the clock signals’ frequency, thus controlling the switches of the voltage converter. To minimize the area of the SC section, MOSFET capacitors were used. A charge reusing scheme was proposed, so as to decrease the loss through the parasitic capacitance of their bottom plate. Laboratorial results, taken from a CMOS solid-state prototype, show that the proposed system can achieve better results than those in the present state of the art.
Hyper Article en Lig... arrow_drop_down Hyper Article en LigneConference object . 2016License: CC BYFull-Text: https://hal.inria.fr/hal-01438242/documentData sources: Hyper Article en Lignehttps://hal.inria.fr/hal-01438...Part of book or chapter of bookLicense: CC BYData sources: UnpayWallINRIA a CCSD electronic archive serverConference object . 2016License: CC BYData sources: INRIA a CCSD electronic archive serverMémoires en Sciences de l'Information et de la CommunicationConference object . 2016License: CC BYhttps://doi.org/10.1007/978-3-...Part of book or chapter of book . 2016 . Peer-reviewedLicense: Springer TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/978-3-319-31165-4_19&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eumore_vert Hyper Article en Lig... arrow_drop_down Hyper Article en LigneConference object . 2016License: CC BYFull-Text: https://hal.inria.fr/hal-01438242/documentData sources: Hyper Article en Lignehttps://hal.inria.fr/hal-01438...Part of book or chapter of bookLicense: CC BYData sources: UnpayWallINRIA a CCSD electronic archive serverConference object . 2016License: CC BYData sources: INRIA a CCSD electronic archive serverMémoires en Sciences de l'Information et de la CommunicationConference object . 2016License: CC BYhttps://doi.org/10.1007/978-3-...Part of book or chapter of book . 2016 . Peer-reviewedLicense: Springer TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/978-3-319-31165-4_19&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Part of book or chapter of book , Conference object , Article 2011 France, PortugalPublisher:Springer Berlin Heidelberg Authors: Carvalho, Carlos; Lavareda, Guilherme; Paulino, Nuno;handle: 10400.21/2063
A DC-DC step-up micro power converter for solar energy harvesting applications is presented. The circuit is based on a switched-capacitor voltage tripler architecture with MOSFET capacitors, which results in an area approximately eight times smaller than using MiM capacitors for the 0.13μm CMOS technology. In order to compensate for the loss of efficiency, due to the larger parasitic capacitances, a charge reutilization scheme is employed. The circuit is self-clocked, using a phase controller designed specifically to work with an amorphous silicon solar cell, in order to obtain the maximum available power from the cell. This will be done by tracking its maximum power point (MPPT) using the fractional open circuit voltage method. Electrical simulations of the circuit, together with an equivalent electrical model of an amorphous silicon solar cell, show that the circuit can deliver a power of 1132 μW to the load, corresponding to a maximum efficiency of 66.81%.
Hyper Article en Lig... arrow_drop_down Hyper Article en LigneConference object . 2011License: CC BYFull-Text: https://hal.inria.fr/hal-01566570/documentData sources: Hyper Article en LigneRepositório Científico do Instituto Politécnico de LisboaArticle . 2012INRIA a CCSD electronic archive serverConference object . 2011License: CC BYData sources: INRIA a CCSD electronic archive serverMémoires en Sciences de l'Information et de la CommunicationConference object . 2011License: CC BYhttps://doi.org/10.1007/978-3-...Part of book or chapter of book . 2011 . Peer-reviewedData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/978-3-642-19170-1_56&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eumore_vert Hyper Article en Lig... arrow_drop_down Hyper Article en LigneConference object . 2011License: CC BYFull-Text: https://hal.inria.fr/hal-01566570/documentData sources: Hyper Article en LigneRepositório Científico do Instituto Politécnico de LisboaArticle . 2012INRIA a CCSD electronic archive serverConference object . 2011License: CC BYData sources: INRIA a CCSD electronic archive serverMémoires en Sciences de l'Information et de la CommunicationConference object . 2011License: CC BYhttps://doi.org/10.1007/978-3-...Part of book or chapter of book . 2011 . Peer-reviewedData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/978-3-642-19170-1_56&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu