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IEEE 38th International Conference on Electronics and Nanotechnology (ELNANO)

作者： Revko, Anatoliy S. Yershov, Roman D. Yakosenko, Denys S. Beznosko, Dmytro A. CNUT Ind Elect Dept Chernihiv Ukraine

ISBN: (纸本)9781538663837

The problems dealing with usage the pulse-width modulation in quasi-resonant converters are considered. A deep overview of existing control techniques for quasi-resonant converters shows that is possible to use of combined control technique, which consists in applying pulse-width modulation 'in-large' and pulse-frequency modulation 'in-small' was established. A novel approach of resonant circuit parameter changing use the switched capacitors array was proposed and simulated. Control based on load resistance observer in combinational with lookup table leads to simple and robust control unit. Proposed converter eliminates the main disadvantage of quasi-resonant converters and can be use in portable power supply and energy storage systems.

关键词： quasi-resonat pulse-width modulation pulse-frequency modulation LUT-based control load observer portable power supply energy storage systems

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Smooth pulse-Width modulation in Quasi-Resonant pulsed Converters Using Transistor as a Voltage-Controlled Capacitance 38

Smooth Pulse-Width Modulation in Quasi-Resonant Pulsed Conve...

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IEEE 38th International Conference on Electronics and Nanotechnology (ELNANO)

作者： Revko, Anatoliy S. Yershov, Roman D. Beznosko, Dmytro A. Yakosenko, Denys S. CNUT Ind Elect Dept Chernihiv Ukraine

ISBN: (纸本)9781538663837

the problems of usage the pulse-width modulation in quasi-resonant converters are considered. Dependence of the parasitic drain-source (collector-emitter) capacitance of power transistors on applied of gate-source (base-emitter) voltage was established. A novel clarification of the mathematical model for high-power bipolar-junction and field-effect transistors taking into account parasitic capacitance changing under control voltage was developed. The possibility of using pulse-width modulation in conjunction with a quasi-resonant converter by using of bipolar-junction and field-effect transistors as a voltage-controlled capacitance for changing the natural frequency of resonant circuit was proposed. Proposed converter eliminates the main disadvantage of quasi-resonant converters and can be use in portable power supply and energy storage systems.

关键词： quasi-resonant pulse-width modulation pulse-frequency modulation parasitic capacitance model voltage-controlled capacitance portable power supply energy storage systems

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A 144-MHz Fully Integrated Resonant Regulating Rectifier With Hybrid pulse modulation for mm-Sized Implants

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IEEE JOURNAL OF SOLID-STATE CIRCUITS 2017年第11期52卷 3043-3055页

作者： Kim, Chul Ha, Sohmyung Park, Jiwoong Akinin, Abraham Mercier, Patrick P. Cauwenberghs, Gert Univ Calif San Diego Dept Bioengn La Jolla CA 92093 USA New York Univ Abu Dhabi Elect & Comp Engn Div Engn Abu Dhabi 129188 U Arab Emirates Univ Calif San Diego Elect & Comp Engn Dept La Jolla CA 92093 USA

This paper presents a fully integrated resonant regulating rectifier (IR3) with an on-chip coil used to wirelessly power mm-sized implants. By combining rectification and regulation in a single stage, and controlling this stage via a hybrid pulse-width modulation and pulse-frequency modulation (PFM) feedback scheme, the IR3 avoids efficiencylimiting cascaded losses while enabling tight voltage regulation with low dropout and ripple. The IR3 is implemented in 0.078 mm(2) of active area in 180-nm Silicon oxide insulator (SOI) CMOS, and achieves a 1.87% Delta V-DD/V-DD power supply regulation ratio with a 1-nF decoupling capacitor despite a tenfold load current variation from 8 to 80 mu A. A 0.8-V V-DD is maintained at a 8-k Omega load for 144-MHz RF inputs ranging from 0.98 to 1.5 V. At 1-V regulation, the voltage conversion efficiency is greater than 92% with less than 5.2-mVpp ripple, while the power conversion efficiency is 54%. The measured overall wireless power transfer system efficiency, from the primary coil to VDD output of the IR3, is 2% at 160-mu W load, and reaches 5% at 700 mu W.

关键词： mm-sized implant on-chip coil pulse-frequency modulation pulse-width modulation (PWM) regulating rectifier wireless power transfer (WPT)

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A Single-Inductor MIMO Buck-Boost Converter with Inductor-Peak-Current PFM Control for Multiple Energy Harvesting 12

A Single-Inductor MIMO Buck-Boost Converter with Inductor-Pe...

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2017 IEEE 12th International Conference on ASIC

作者： Chen Jiao Zunchao Li Chuang Wang Lvchen Zhou Hailong Bai School of Microelectronics Xi'an Jiaotong University Guangdong Xi'an Jiaotong University Academy

ISBN: (纸本)9781509066261;9781509066254

This paper presents a single-inductor four-input-three-output buck-boost converter which can harvest energy from three sources simultaneously,with a wide range of input voltage from 0.2 V to 3 V.A control strategy combining the inductor-peak-current(IPC)controls and pulse-frequency modulation(PFM) is proposed to suit for the muli-sources energy *** IPC control is used to improve the efficiency and decrease the output voltage *** PFM is utilized to regulate the outputs as well as make the three sources around their maximum power point(MPPT).The converter is designed and verified in the CSMC 0.18 um *** results show that the efficiency of the converter is no less than 74% under the wide range of input voltage with load varying from 10 uW to 1 mW.

关键词： Buck-boost converter single inductor multi-output inductor peak current pulse-frequency modulation

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Superconducting bipolar digital-to-analog converter equipped with dual double-flux-quantum amplifier

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IEICE ELECTRONICS EXPRESS 2016年第10期13卷 20160242-20160242页

作者： Mizugaki, Yoshinao Watanabe, Tomoki Shimada, Hiroshi Univ Electrocommun UEC Tokyo Grad Sch Informat & Engn Dept Engn Sci 1-5-1 Chofugaoka Chofu Tokyo 1828585 Japan

Precise voltage generation is a unique feature of superconducting single-flux-quantum (SFQ) circuits, and hence, several SFQ-based digital-to-analog converters (DACs) have been designed for metrological applications. In this letter, we propose a dual double-flux-quantum amplifier (dual-DFQA) that extends DAC output voltage from unipolar to bipolar. An SFQ-based DAC comprising a 4-bit variable pulse number multiplier and a +/- 20-fold dual-DFQA is fabricated using a niobium integration technology. A 1-kHz, +/- 0.29-mV sinusoidal voltage waveform is successfully synthesized.

关键词： Josephson effects single-fluq-quantum (SFQ) niobium integrated circuits pulse-frequency modulation

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Implementation and Design of Voltage-Mode PFM Control Buck Power Converter

Implementation and Design of Voltage-Mode PFM Control Buck P...

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3rd International Conference on Energy, Environment and Sustainable Development (EESD 2013)

作者： Lee, Min-Chin Jian, Ruey-Wun Orient Inst Technol New Taipei City Taiwan

ISBN: (纸本)9783037859728

A lower power consumption, smaller output ripple and better regulation buck dc-dc converter controlled by voltage feedback and pulse-frequency modulation (PFM) mode is implemented in this paper. The converter operating in discontinuous conduction mode (DCM) is designed and simulated using the TSMC 0.18 mu m 1P6M CMOS Process. Hspice simulation results show that, the buck converter having 0.88 x 0.88mm(2) chip size with power dissipation about 0.68mW. This chip can operate with input supply voltage from 1.2V to 1.8V, and switching frequency from 249KHz (V-m =1.8V, I-Load =100mA) to 50KHz (V-m =1.2V, I-Load =5mA), and its output voltage can stable at 1.0V and less than 110mV ripple voltage at maximum loading current 100 mA.

关键词： pulse-frequency modulation Buck Converter Zero-Current Detector and Anti-Ringing Circuit Hysteretic Comparator Current Reference Circuit Soft-Start Circuit

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A Soft-Started PFM-Controlled Buck Converter for Low-Power Applications

A Soft-Started PFM-Controlled Buck Converter for Low-Power A...

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2014 International Conference on Electrical and Electronic Engineering(EEE 2014)

作者： Min-chin LEE Ruey-en JIANG Orient Institute of Technology

A PFM-controlled buck converter with an on-chip soft-start circuit is implemented in this *** soft-start circuit can produce a slowly rising output voltage without extra clock or any external component to prevent inrush current and output voltage overshoot during the start-up period of the *** converter operating in discontinuous conduction mode（DCM） is designed and implemented by using the TSMC 0.18μm 1P6 M CMOS *** results show that,the buck converter having 0.88 × 0.88mm chip size with power dissipation about 0.68 *** chip can operate with input supply voltage from 1.2V to 1.8V,and switching frequency from 249KHz(V=1.8V,=100m A) to 50KHz(V=1.2V,I=5m A),and its output voltage can stable at 1.0V and less than 110 mV ripple voltage at maximum loading current 100 *** lower power consumption and smaller output ripple,the proposed converter is suitable for portable or low-power devices.

关键词： pulse-frequency modulation Soft-start circuit Buck converter Zero-current detector and anti-ringing circuit Hysteretic comparator

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Double-series Resonant Inverter-fed Voltage Multiplier Based High-Voltage DC-DC Converter

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ELECTRIC POWER COMPONENTS AND SYSTEMS 2013年第15期41卷 1518-1535页

作者： Lee, Sze Sing Iqbal, Shahid Kamarol, Mohamad Univ Malaysia Perlis Sch Elect Syst Engn Perlis 02600 Malaysia Univ Sains Malaysia Sch Elect & Elect Engn George Town Malaysia

This article presents a novel series resonant inverter-fed high-voltage DC-DC converter. The proposed converter consists of two resonant tanks that are energized by a half-bridge inverter. Two high-voltage transformers are utilized, with their individual secondary winding connected to a voltage multiplier so that the output voltage is rectified and boosted. The outputs of the voltage multipliers are connected in series to supply the load. The proposed converter operates in discontinuous conduction mode. A dual-mode pulse-frequency modulation control strategy is implemented to regulate the output voltage and to achieve fast transient response during startup of the converter. All power switches turn ON and OFF under zero current switching condition. The main features of the proposed converter are lower conduction loss, lower switching loss, and, consequently, higher efficiency compared to the conventional full-bridge inverter-fed high-voltage DC-DC converter. The proposed converter also has faster transient response during startup. Experimental results of a 100-W prototype confirm the excellent operation and performance of the converter.

关键词： double-series resonant high-voltage DC-DC converter pulse-frequency modulation zero current switching

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An Ultra-Low Input Flyback Converter with Wide Conversion Ratio Utilizing Zero-current Switching Techniques

An Ultra-Low Input Flyback Converter with Wide Conversion Ra...

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IEEE 10th International Conference on Power Electronics and Drive Systems (PEDS)

作者： Chou, Chang-I Wu, Tse-Hsu Chen, Jiann-Jong Hwang, Yuh-Shyan Yu, Cheng-Chieh Natl Taipei Univ Technol Dept Elect Engn Taipei 106 Taiwan

ISBN: (纸本)9781467317924;9781467317900

An ultra-low input flyback converter is proposed in this paper. Instead of the conventional flyback topology, the improved topology is able to reduce more power consumption to achieve high efficiency by replacing the output diode with a power transistor. This design can achieve wide conversion ratio and high conversion efficiency by utilizing transformer and digitally controlled zero-current switching techniques operates from input voltage 20 mV to 250 mV while supplying an output 1.8V, delivers maximum 18 mW of output power and 92.63% efficiency for a 250 mV input. The proposed circuit has been designed with TSMC 0.18um CMOS 1P6M processes. The total chip area is 1.19 x 1.18mm(2) with PADs.

关键词： Flyback converter energy harvesting low power low voltage pulse-frequency modulation zero-current switching DC-DC converter

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A New Sensing Scheme for Sensitivity Enhancement of Low-Temperature Polycrystalline Silicon Photodetecors

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IEEE SENSORS JOURNAL 2011年第6期11卷 1478-1483页

作者： Chen, Chih-Yang Lin, Chrong-Jung King, Ya-Chin Natl Tsing Hua Univ Inst Elect Engn Hsinchu 300 Taiwan

A photo-detector employing a pulse-frequency-modulation (PFM) circuit featuring an adjustable response is realized on a Low Temperature Polycrystalline Silicon (LTPS) panel. A constant-biasing scheme on the photodiode is proposed to overcome the low sensitivity problem in LTPS PIN diodes and greatly improves the output response. Furthermore, an LTPS PIN diode model capable of accurately predicting the characteristics of the detector circuits is established and verified.

关键词： Low-temperature polycrystalline silicon thin-film transistors pulse-frequency modulation Schmitt trigger

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