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switched-capacitor Multi-level Inverter with Equal Distribution of the capacitors Discharging Phases

Chinese Journal of Electrical Engineering 2020年第4期6卷 42-52页

作者： Zhiyuan Xu Xiaofeng Zheng Tong Lin Jia Yao Adrian Ioinovici College of Automation Nanjing University of Science and TechnologyNanjing 210014China College of Automation Nanjing University of Aeronautics and AstronauticsNanjing 210016China

A new switched-capacitor(2n+1)levels inverter with a single input source and equal charge of the capacitors at the input voltage V_(in) is *** with its peers from the same class of inverters,the proposed one features an equal or lower components count referred to the boost ***,it presents an additional advantage:each voltage level can be obtained by using different capacitors in the discharging phase,such that the decreasing part of the staircase output waveform can be synthesized with different switching topologies than those used in the increasing *** a consequence,all the capacitors are discharged at the same voltage value at the end of each half-cycle,allowing for the use of smaller capacitors of equal *** the capacitors are connected in parallel in the charging phase,there is no need to equalize their voltages,so no additional current spikes *** also implies less electromagnetic emission(EMI).Two types of modulation strategies are proposed.A half-height fundamental switching frequency modulation strategy allows for reaching the desired peak of the output voltage during the highest voltage level *** is advantageous in application of the inverter as a front end of a grid supplied by green sources of energy.A high frequency(f_(s)=200 kHz)modulation strategy accompanied by a duty-cycle control is advantageous for applications which require miniaturization.A 9-level switched-capacitor multi-level inverter(SCMLI)is analyzed and *** power losses are *** experimental results for a 9-level inverter with V_(in)=40 V,V_(out)=110 Vrms 50 Hz,200 W confirm the theoretical expectations.

关键词： switched-capacitor multi-level inverter half-height frequency modulation

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Single-source switched-capacitor Boost Nine-level Inverter with Reduced Components

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CSEE Journal of Power and Energy Systems 2023年第5期9卷 1688-1697页

作者： Kaibalya Prasad Panda R.T.Naayagi Pravat Kumar Ray Gayadhar Panda the Department of Electrical Engineering Pandit Deendayal Energy UniversityGandhinagar 382007India the School of Electrical and Electronic Engineering Newcastle University International Singapore567739Singapore the Department of Electrical Engineering National Institute of Technology RourkelaRourkela 769008India the Department of Electrical Engineering National Institute of Technology MeghalayaShillong 793003India

Increasing demands for improvement in power quality and power capacity have contributed to development of switched-capacitor multilevel inverters(SCMLIs).Recently developed SCMLIs enable single-stage voltage boosting,as well as inversion resulting in step-up ac *** reduction in number of components,this paper introduces a boost type singlesource nine-level(9-level)SCMLI employing two capacitors and three *** to the series-parallel connection process,capacitor voltages are inherently balanced and assist in quadruple voltage boosting from a *** voltage stress across semiconductor devices is limited to twice input voltage *** a minimum number of components,the proposed SCMLI can be extended to increase voltage levels without additional dc *** extension module adds two additional voltage steps in the output while maintaining maximum voltage stress the same as 9-level *** by in-depth analysis of circuit operation and power losses,a thorough comparison of recently developed single-phase 9-level MLIs is carried out,which verifies design *** simulation and experimental results are presented to verify the prominent features of the 9-level SCMLI under dynamic operating conditions.

关键词： Multilevel inverter reduced components,self-voltage balance single-source switched-capacitor voltage gain

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A 150-nA 13.4-ppm/℃switched-capacitor CMOS sub-bandgap voltage reference

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Journal of Semiconductors 2011年第4期32卷 155-160页

作者：严伟李文宏刘冉 State Key Laboratory of ASIC & Systems Fudan University

A nanopower switched-capacitor CMOS sub-bandgap voltage reference has been implemented using a Chartered 035-μm 3.3-V/5-V dual gate mixed-signal CMOS *** proposed circuit generates a precise sub-bandgap voltage of 1 *** temperature coefficient of the output voltage is 13.4 ppm/℃with the temperature varying from -20 to 80℃.The proposed circuit operates properly with the supply voltage down to 1.3 V,and consumes 150 nA at room *** line regulation is 0.27%/*** power supply rejection ratio at 100 Hz and 1 MHz is -39 dB and -51 dB,*** chip area is 0.2 mm2.

关键词： nanopower sub-bandgap switched-capacitor voltage reference

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An offset-insensitive switched-capacitor bandgap reference with continuous output

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Journal of Semiconductors 2009年第8期30卷 132-135页

作者：郑鹏严伟张科李文宏 State Key Laboratory of ASIC & System Fudan University

An improved switched-capacitor bandgap reference with a continuous output voltage of 1.26 V has been implemented with Chartered 0.35-μm 5-V CMOS process. The output offset voltage, induced by non-ideal characteristics of operational amplifier and bias current generator, is suppressed by the proposed sample-and-hold circuit and self-bias technique. Experimental results show that the proposed circuit operates properly under a supply voltage varying from 3 to 5 V. The measured temperature coefficient is 112 ppm/℃ and the power supply rejection ratio of output voltage without any filtering capacitor is -40 dB and -33 dB at 100 Hz and 10 MHz, respectively.

关键词： bandgap reference switched-capacitor offset self-bias continuous output

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A Double Input-parallel-output-series Hybrid switched-capacitor Boost Converter

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Chinese Journal of Electrical Engineering 2020年第4期6卷 15-27页

作者： Jianfei Chen Kewei Ding Yulin Zhong Fujin Deng Sayed Abulanwar Department of Electrical and Computer Engineering Wayne State UniversityMichigan 48202USA Broad-Ocean Technologies NoviMichigan 30120USA School of Electrical Engineering Southeast UniversityNanjing 210096China Electrical Engineering Department Mansoura UniversityMansoura 35516Egypt

A double input-parallel-output-series hybrid switched-capacitor boost(DIPOS-HSCB)converter is proposed which consists of two different kinds of input-parallel-output-series(IPOS)circuits,i.e.,inner IPOS circuit and outer IPOS *** boost modules and one switched-capacitor network build an inner IPOS circuit based IPOS-HSCB converter and two IPOS-HSCB converters develop the outer IPOS circuit based DIPOS-HSCB *** the proposed DIPOS-HSCB converter,a high voltage-gain with low component stress and small input current ripple are ***,an automatic current balancing function for all input inductor currents can be also achieved using a special carrier phase-shifted modulation scheme.A prototype rated at 200 V/120 W has been developed and the maximum efficiency of the proposed DIPOS-HSCB converter is 95% at 120 *** steady and dynamic results are presented to validate the effectiveness of the proposed DIPOS-HSCB converter.

关键词： IPOS switched-capacitor boost converter phase-shifted modulation automatic current balancing

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Design of Sixth-Order Lowpass Elliptic switched-capacitor Filter

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Journal of Harbin Institute of Technology(New Series) 2016年第6期23卷 47-53页

作者： Dong Yan Liang Yin Xiaowei Liu Wenning Jiang Qiuye Lv MEMS Center Harbin Institute of Technology Key Laboratory of Micro-systems and Micro-structures Manufacturing Ministry of Education

In this paper the design and implementation of sixth-order lowpass elliptic switched-capacitor filter( SCF) for interface circuit of Micro-Electro-Mechanical System( MEMS) sensor are presented. This work aims to lower total harmonic distortion( THD) without deteriorating other performances. After system design in Simulink,the filter is realized in transistor level and finally fabricated in Central Semiconductor Manufacturing Corporation( CSMC) 0.5 μm metal-oxide-semiconductor( CMOS) technology. Typical measured results are: it operates with 25: 1 clock-to-corner frequency ratio and a 10 k Hz maximum corner frequency. The maximum passband ripple is about 0.49 d B and the minimum stopband rejection is 40 d B for the temperature from-20 ℃to 80 ℃. For the 250 k Hz clock frequency setting,given the 1 k Hz,- 8 d BVrms input signal,the measured worst case THD is-64 d B. The active area of the chip is 2.8 mm2 with 8 pads. The analog power dissipation is10 m W from a 5 V power supply.

关键词： switched-capacitor lowpass elliptic filter biquad

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NOVEL LINEAR TRANSFORMATION switched-capacitor FILTER DESIGN

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Journal of Electronics(China) 1989年第1期6卷 19-33页

作者：高岩王文煊谷群山 Department of Communication and Control Engineering Northern Jiaotong UniversityBeijing

This paper presents a novel method that is applied to realize the Linear Transformation(LT)switched-capacitor Filter(SCF).It adopts the Voltage Control Voltage Source(VCVS)equalized transfor-mation to revise the original LC ladder filter and induce it into 16 basic sections and then extend the princi-ple of the LT in order to fit active and 3 port networks and give out switched-capacitor circuits corre-sponding to the 16 basic sections,which can realize all four kinds of filters——LP,HP,BP,BS ***-signed examples are given *** Nth order filter only requires N amplifiers and the circuit is insensitive toparasitic *** experimental results of a 3rd order elliptic LP and a 6th order elliptic BP are giv-en and agree with the theory.

关键词： switched-capacitor filter Linear transformation Voltage control voltage source

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An 18-bit sigma–delta switched-capacitor modulator using 4-order single-loop CIFB architecture

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Journal of Semiconductors 2020年第6期41卷 62-70页

作者： Guiping Cao Ning Dong Research Center of High Speed Machine Vision of Hefei Hefei 230088China

Oversampling sigma–delta(Σ–Δ)analog-to-digital converters(ADCs)are currently one of the most widely used architectures for high-resolution *** rapid development of integrated circuit manufacturing processes has allowed the realization of a high resolution in exchange for ***,theΣ–ΔADC is divided into two parts:a front-end analog modulator and a back-end digital *** performance of the front-end analog modulator has a marked influence on the entireΣ–ΔADC *** this paper,a 4-order single-loop switched-capacitor modulator with a CIFB(cascade-of-integrators feed-back)structure is *** on the chosen modulator architecture,the ASIC circuit is implemented using a chartered 0.35μm CMOS process with a chip area of 1.72×0.75 mm^*** chip operates with a 3.3-V power supply and a power dissipation of 22 *** to the results,the performance of the designed modulator has been improved compared with a mature industrial chip and the effective number of bits(ENOB)was almost 18-bit.

关键词： sigma–delta modulator oversampling CIFB structure switched-capacitor

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High step-up quasi-Z-source DC–DC converters with single switched capacitor branch

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Journal of Modern Power Systems and Clean Energy 2017年第4期5卷 537-547页

作者： Xiaoquan ZHU Bo ZHANG School of Electric Power South China University ofTechnology Guangzhou 510640 China

Aiming to integrate the respective merits of the switched-capacitor converter and the quasi-Z-source converter. An novel high step-up quasi-Z-source DC–DC converter with a single switched-capacitor branch is proposed. Compared to other high boost DC–DC converters,the proposed converter can provide higher output voltage gain, lower current stress across the switches, and lower voltage stress across the output diodes by using the same or similar passive and active components. Therefore, the efficiency and reliability of the converter can be *** topological derivation, operating principle, parameter selection, and comparison with other DC–DC converters are presented. Finally, both simulations and experimental results are given to verify the characteristics of the proposed converter.

关键词： DC–DC converter High voltage gain Quasi-Z-source network switched-capacitor

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HIGH SELECTIVITY SC BANDPASS FILTERS WITH LESS capacitor SPREAD

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Journal of Electronics(China) 1990年第1期7卷 54-61页

作者：吴杰 Hunan University Changsha

Two novel switched-capacitor(SC)bandpass filters using a single operational am-plifier(op amp)are *** designs for minimizing capacitor spread are also ***-bandwidth product(GB)effects of op amps on the proposed SC circuits are taken *** with the proposed circuits and the circuits given by the literatureshow that the new circuits require less chip area in monolithic integration and are less sensitiveto the GB effects.

关键词： switched-capacitor filters Bandpass filters

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