Startup Techniques for 95 mV Step-Up Converter by Capacitor Pass-On Scheme and ${\rm V}_{\rm TH}$-Tuned Oscillator With Fixed Charge Programming

Chen, Po-Hung; Ishida, Koichi; Ikeuchi, Katsuyoshi; Zhang, Xin; Honda, Katsuya; Okuma, Yasuyuki; Yukawa, Ryu; Takamiya, Makoto; Sakurai, Takayasu

doi:10.1109/jssc.2012.2185589

Cited by 124 publications

(60 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The above application space sets the goals for a voltage regulator powering digital circuits. Previous work in this area [3,[8][9][10][11][12][13][14] have attempted to achieve this goal but either had limited output power ranges or displayed degraded efficiency at lower output voltages. Other works such as [15,16] have shown very high power densities but need additional fabrication steps to build the inductor in the interposer or the package substrate high power density and efficiency [17].…”

Section: P=ctotmentioning

confidence: 99%

Improvement Of Conversion Efficiency For Passive Elements Converter Load In Digital Circuits

2018

IJRTER

View full text Add to dashboard Cite

Section: P=ctotmentioning

confidence: 99%

Improvement Of Conversion Efficiency For Passive Elements Converter Load In Digital Circuits

2018

IJRTER

View full text Add to dashboard Cite

“…In [10], the authors propose a mechanical switch that provides an instant power jerk to kick start the harvester. In [11], the authors present a lowvoltage startup technique using a VTH-tuned oscillator and a capacitor pass-on technique. Although a low startup voltage of 95 mV is achieved, the drawback is that this approach requires external programming of a body voltage after fabrication.…”

Section: Designmentioning

confidence: 99%

“…Because the body terminal of a transistor is connected to a high voltage when it is turned off, the reverse leakage is effectively suppressed. In most of the previous works except [11], the self-startup function, which is vital to autonomous operation, is not supported.…”

Section: Designmentioning

confidence: 99%

Resonant Rectifier ICs for Piezoelectric Energy Harvesting Using Low-voltage Drop Diode Equivalents

Din

Chandrathna

Lee

2017

Preprint

View full text Add to dashboard Cite

Herein, we present the design technique of a resonant rectifier for piezoelectric (PE) energy harvesting. We propose two diode equivalents to reduce the voltage drop in the rectifier operation, a minuscule-drop-diode equivalent (MDDE) and a low-drop-diode equivalent (LDDE). The diode equivalents are embedded in resonant rectifier integrated circuits (ICs), which use symmetric bias-flip to reduce the power wasted for charging and discharging the internal capacitance of a PE transducer. The self-startup function is supported by synchronously generating control pulses for the bias-flip from the PE transducer. Two resonant rectifier ICs, using both MDDE and LDDE, are fabricated in a 0.18 μm CMOS process and their performances are characterized under external and self-power conditions. Under the external-power condition, the rectifier using LDDE delivers an output power POUT of 564 μW and a rectifier output voltage VRECT of 3.36 V with a power conversion efficiency (PCE) of 90.1%. Under self-power conditions, the rectifier using MDDE delivers a POUT of 288 μW and a VRECT of 2.4 V with a corresponding PCE of 74.6%. The result shows that the power extraction capability of the proposed rectifier is 5.9 and 3.0 times higher than that of a conventional full-bridge rectifier.

show abstract

“…These power circuits have the ability to provide impedance matching to attain maximum energy potential of the sources and also responsible for relevant step-up or down conversion. Chandrakasan (2011), Carlson et al (2010) and Chen et al (2012) addressed a low voltage issue from thermal harvester. Hence, the start-up circuit used an array of discrete MOSFETs which is worked with appropriate gate threshold to kick start the system operation.…”

Section: Introductionmentioning

confidence: 99%

“…Basically, a start-up circuit consists of energy storage, a regulated DC-DC buck converter and inductive boost converter. Chen et al (2012) presented a start-up voltage DC-DC converter without using additional off-chips components, the capacitor pass-on technique allow the system operation under the low power voltage. Ramadass and Chandrakasan (2011) recommended the start-up circuit for TEG harvester due to an extremely low input voltage.…”

Section: Introductionmentioning

confidence: 99%

Architecture of Ultra-Low-Power Micro Energy Harvester Using Hybrid Input for Biomedical Devices

Semsudin

Sampe

Islam

et al. 2015

Asian J. of Scientific Research

View full text Add to dashboard Cite

This research work presents an Ultra-Low-Power (ULP) Hybrid Micro Energy Harvester (HMEH) for biomedical application. This architecture uses the inputs of Thermoelectric Generator (TEG) and body vibration. TEG is based on temperature gradient between the ambient environment and human body. While vibration is based on the vibrate sources like motor that is able to generate an AC voltage. Having two sources overcome the issue of limitation caused by single source harvester but will result in impedance mismatching among the desired sources. The proposed of HMEH architecture consists of a control manager with Asynchronous Finite State Machine (AFSM) to grab the proper input value, a rectification to convert vibration input from AC to DC, a start-up to initialize the desired input, a Maximum Power Point Tracking (MPPT) to achieve maximum power extraction, a boost converter to boost up the input voltage, energy storage to keep the energy and voltage regulator to fix or produce the desired output voltage. A single power management circuit is used to reduce the number of components used and power losses. The HMEH will be modeled, designed and simulated using PSPICE software and then implement in 0.13 µm CMOS technology. Next, the developed HMEH will be coding using Verilog Hardware Description Language (VHDL) under mentor graphics and then download to Field Programmable Gate Array (FPGA) for real time implementation. The expectation from this ULP HMEH is to achieve 2.0-4.0 V of regulated voltage output from input sources range of 80-600 mV at start-up with an efficiency of 93%.

show abstract

Startup Techniques for 95 mV Step-Up Converter by Capacitor Pass-On Scheme and ${\rm V}_{\rm TH}$-Tuned Oscillator With Fixed Charge Programming

Cited by 124 publications

References 11 publications

Improvement Of Conversion Efficiency For Passive Elements Converter Load In Digital Circuits

Improvement Of Conversion Efficiency For Passive Elements Converter Load In Digital Circuits

Resonant Rectifier ICs for Piezoelectric Energy Harvesting Using Low-voltage Drop Diode Equivalents

Architecture of Ultra-Low-Power Micro Energy Harvester Using Hybrid Input for Biomedical Devices

Contact Info

Product

Resources

About