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A Millimeter-Scale Energy-Autonomous Sensor System With Stacked Battery and Solar Cells

Matthew Fojtik, Daeyeon Kim, Gregory Chen, Yu-Shiang Lin, David Fick, Junsun Park, Mingoo Seok, Mao-Ter Chen, Zhiyoong Foo, David Blaauw, Dennis Sylvester
2013 IEEE Journal of Solid-State Circuits  
An 8.75 mm microsystem targeting temperature sensing achieves zero-net-energy operation using energy harvesting and ultra-low-power circuit techniques.  ...  Two 1 mm solar cells and a thin-film Li battery power the microsystem through an integrated power management unit.  ...  For an SCVR with these ultra-low-power loads, power overheads must scale to picowatt levels and are dominated by clock generation and distribution.  ... 
doi:10.1109/jssc.2012.2233352 fatcat:qfviwhekbzb25ozxwuof4kdqri

Design and Analysis of Ultra Low Power True Single Phase Clock CMOS 2/3 Prescaler

M.V. Krishna, Manh Anh Do, Kiat Seng Yeo, Chirn Chye Boon, Wei Meng Lim
2010 IEEE Transactions on Circuits and Systems Part 1: Regular Papers  
Meaamar for their valuable discussion and advice. They also wish to acknowledge the support of Chartered Semiconductor Manufacturing for wafer fabrication.  ...  The prescaler in [15] eliminates only the switching power in DFF1 during the divide-by-2 mode but does little to the short circuit power making the circuit not suitable for ultra low power applications  ...  In Section IV an improved speed and low power TSPC 2/3 prescaler is proposed which reduces the switching power consumption, improves frequency of operation and in the Section V an ultra low power TSPC  ... 
doi:10.1109/tcsi.2009.2016183 fatcat:kuz5hukydjbflmvqd6bhlbtbey

A High Performance Adaptive Digital LDO Regulator with Dithering and Dynamic Frequency Scaling for IoT Applications

Muhammad Asif, Imran Ali, Danial Khan, Muhammad Riaz Ur Rehman, A Qurat-ul-Ain, Muhammad Basim, Young Gun Pu, Minjae Lee, Keum Cheol Hwang, Youngoo Yang, Kang-Yoon Lee
2020 IEEE Access  
INDEX TERMS Adaptive, dithering, digital LDO, dynamic frequency scaling (DFS), fully synthesizable, fast transient, hill climbing, limit cycle oscillation (LCO), low power, multi-loop.  ...  The operating frequency is 10 MHz with fast transient response and quiescent current of 350 ns and 3.7 µA, respectively.  ...  (DC), dynamic frequency scaling (DFS) with configurable ultra-low power oscillator (ULPO) is proposed.  ... 
doi:10.1109/access.2020.3009601 fatcat:dpp7wz6v3zgrfbqj7ztzvcspha

CMOS Integrated Switched-Mode Transmitters for Wireless Communication [chapter]

Ellie Cijvat
2010 Advances in Solid State Circuit Technologies  
Other examples are a class-E switched mode PA with pulse-width and pulse-position modulation (PWPM) implemented with all-digital blocks, an array of power mixers, controlled by digital logic, and an array  ...  Power amplifier technology issues Generally a switched-mode (SM) amplifier consists of one or more transistors that are behaving as a switch, that is, having an on-and an off-stage, ideally without on-resistance  ...  A MOSFET is very suitable as a switch, toggling between the off mode for low gate-source voltage V GS , and the triode region for high V GS .  ... 
doi:10.5772/8626 fatcat:hv6yajrcsretbapmzeibz5ekfa

An Experimental Study on Step-Up DC–DC Converters for Organic Photovoltaic Cells

P. Mendonça dos Santos, António J. Serralheiro, Beatriz Borges, João Paulo N. Torres, Ana Charas
2022 Journal of Low Power Electronics and Applications  
solution for ultra-low power harvesting applications.  ...  Both experimental circuits include the drive of the MOSFET switch based on an LC oscillator at 1.2 MHz, allowing the implementation of a conversion system, supplied by voltages as low as 500 mV, with output  ...  Acknowledgments: The authors wish to thank Lieutenant Serras Duarte for his initial help in the design of the prototypes. Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/jlpea12020020 fatcat:irha7loiynfhvcjpn2yloj4g4i

HighEfficiency LowVoltage DCDC Conversion for Portable Applications [chapter]

2009 Low-Voltage/Low-Power Integrated Circuits and Systems  
A new ultra-low-swing I/O strategy, enabled by an ultra-low-voltage and low-power DC-DC converter, is used to reduce the power of high-speed inter-chip communication by greater than two orders of magnitude  ...  Recent innovations in low-power digital CMOS design have assumed that the supply voltage is a free variable and can be set to any arbitrarily low level with little penalty.  ...  The incoming signal is driven off-chip by an NMOS buffer running at an ultra-low supply voltage, V LO .  ... 
doi:10.1109/9780470545065.ch12 fatcat:jzmy5jhfb5f5pop2n5ezbnksza

A fast, ultra-low and frequency-scalable power consumption, 10-bit SAR ADC for particle physics detectors

M. Firlej, T. Fiutowski, M. Idzik, S. Kulis, J. Moron, K. Swientek
2015 Journal of Instrumentation  
A : The design and measurements results of a fast 10-bit SAR ADC with ultra-low and scalable with frequency power consumption, developed for readout systems for detectors at future particle physics colliders  ...  A dynamic and asynchronous internal logic makes the ADC very well suited not only for commonly used synchronous sampling but also for applications with asynchronous sampling and/or the ones requiring power  ...  Acknowledgments This work was supported by Polish National Science Centre (NCN), grant reference number DEC-2012/07/B/ST7/01456.  ... 
doi:10.1088/1748-0221/10/11/p11012 fatcat:4jrztnsg2nc2tjylkf6bmqm4um

Optically controlled switch-mode current-source amplifiers for on-coil implementation in high-field parallel transmission

Natalia Gudino, Qi Duan, Jacco A. de Zwart, Joe Murphy-Boesch, Stephen J. Dodd, Hellmut Merkle, Peter van Gelderen, Jeff H. Duyn
2015 Magnetic Resonance in Medicine  
Method-We designed a current-source switch-mode amplifier based on miniaturized, nonmagnetic electronics.  ...  Amplifier performance was tested by benchtop measurements as well as with imaging at 7 T (300 MHz) and 11.7 T (500 MHz).  ...  Acknowledgement This research was supported by the Intramural Research Program of the National Institute of Neurological Disorders and Stroke.  ... 
doi:10.1002/mrm.25857 pmid:26256671 pmcid:PMC4749483 fatcat:msczyg6pnbdifhejyoohq2stna

A subthreshold current-sensing ΣΔ modulator for low-voltage and low-power sensor interfaces

Nikola Katic, Ibrahim Kazi, Armin Tajalli, Alexandre Schmid, Yusuf Leblebici
2014 International journal of circuit theory and applications  
The presented modulator is used as a readout interface for sensors with current-mode output in ultra low-power conditions and is also suitable to perform on-chip current measurements in power management  ...  As a benefit of this technique, the current-sensing CT ΣΔ modulator operates at low voltage and consumes very low power, which makes it convenient for low-power and low-voltage current-mode sensor interfaces  ...  ACKNOWLEDGEMENTS This work was supported by the Swiss National Foundation (SNSF), under the project number 200020-146369.  ... 
doi:10.1002/cta.2026 fatcat:spv2e2eakraqppchi7w6fx5ghm

Proposal and design methodology of switching mode low dropout regulator for Bio-medical applications

Kenya Kondo, Hiroki Tamura, Koichi Tanno
2019 International Journal of Electrical and Computer Engineering (IJECE)  
The proposed circuit is suitable for adopting to the light load and low frequency applications.</p>  ...  In this study, we target the application to the power supply circuit for the analog front end (AFE) of bio-medical system (such as daily-used bio-monitoring devices) whose required maximum load current  ...  ACKNOWLEDGEMENT This work is supported by VLSI Design and Education Center (VDEC), the University of Tokyo in collaboration with Cadence Design Systems, Inc. The authors would like to thank Mrs.  ... 
doi:10.11591/ijece.v9i6.pp5046-5059 fatcat:3afcwp3vujhvrltmijf4onq2qq

Ultra Fast Fixed-Frequency Hysteretic Buck Converter With Maximum Charging Current Control and Adaptive Delay Compensation for DVS Applications

Feng Su, Wing-Hung Ki, Chi-Ying Tsui
2008 IEEE Journal of Solid-State Circuits  
Although the converter works with hysteretic voltage mode control, an adaptive delay compensation scheme is employed to keep the switching frequency constant at 850 kHz to within 2.5% across the whole  ...  His research interests are fully integrated power management units for RFID, micro-sensor and biomedical systems, analog IC design techniques with emphasis on high-performance switch mode and switched-capacitor  ...  With no delay compensation, for 3.0 V, the switching frequency changes from 886 kHz to 1.57 MHz, a change of 28% w.r.t. the average frequency of 1.23 MHz.  ... 
doi:10.1109/jssc.2008.917533 fatcat:he2437rjizch3jd7iyjgahvjve

Integration with Energy Harvesting Technology

S. Williams, M. Zhu, V. Marsic
2012 Telfor Journal  
This paper reports on the design and implementation of a wireless sensor communication system with a low power consumption that allows it to be integrated with the energy harvesting technology.  ...  The reduction in power consumption, at hardware level in particular, is mainly achieved through the introduction of an energy-aware interface (EAI) that ensures a smart inter-correlated management of the  ...  from the power supply by an external monitoring circuit.  ... 
doaj:aafdef97086247239464e3ce97829832 fatcat:22qyozeuofcgtpsw44wgvlhjdi

A Novel Common Power Factor Correction Scheme for Homes And Offices

S. Basu, M.H.J. Bollen
2005 IEEE Transactions on Power Delivery  
standard EN 61000-3-2 for limiting generation of low-frequency harmonics and different PFC techniques and strategies useful for meeting this standard, are studied.  ...  In this thesis, front-end solutions with single-phase power factor correction (PFC) capability are studied.  ...  Digital control of switch mode power supplies with a PFC circuit front end is an evolving field today.  ... 
doi:10.1109/tpwrd.2005.848444 fatcat:pu2jfnckifbmtebual5mvellmm

Design and Optimization of an Autonomous, Ambulatory Cardiac Event Monitor

Bertrand Massot, Florin Hutu, Claudine Gehin, Norbert Noury
2018 2018 IEEE 20th International Conference on e-Health Networking, Applications and Services (Healthcom)  
Initial results show that this sensor could be suitable for a truly continuous and long-term monitoring of cardiac events.  ...  We therefore designed and evaluated a connected sensor for the ambulatory monitoring of cardiac events, which can be used as an autonomous device without the need of a battery.  ...  active mode with an operating frequency of 1 MHz.  ... 
doi:10.1109/healthcom.2018.8531180 dblp:conf/healthcom/MassotHGN18 fatcat:qow2nocd4jagdnvgtm54kzxefi

Design of a reference voltage buffer for a 10-bit 50 MS/s SAR ADC in 65 nm CMOS

Prakash Harikumar, J Jacob Wikner
2015 2015 IEEE International Symposium on Circuits and Systems (ISCAS)  
Since the signal frequencies in these distributed WSNs are often low, ultra-low-power ADCs with low sampling rates are required.  ...  ultra-low-voltage fully differential OTA with V DD = 0.4 V has been designed to satisfy the comprehensive specifications of a general-purpose OTA while limiting the power consumption to 785 nW. c) Design  ...  Acknowledgments It has been an arduous, oft-enervating trek. I am beholden to those who helped me prevail.  ... 
doi:10.1109/iscas.2015.7168617 dblp:conf/iscas/HarikumarW15 fatcat:vedlais3pfdh3j3liiohu73lxy
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