scispace - formally typeset
Search or ask a question
Topic

Switched capacitor

About: Switched capacitor is a research topic. Over the lifetime, 8832 publications have been published within this topic receiving 115142 citations.


Papers
More filters
Journal ArticleDOI
TL;DR: To integrate the advantages of the high voltage gain of a switched-capacitor (SC) converter and excellent output regulation of a switching-mode dc-dc converter, a method of combining the two types of converters is proposed in this paper.
Abstract: In a photovoltaic (PV)- or fuel-cell-based grid-connected power system, a high step-up dc-dc converter is required to boost the low voltage of a PV or fuel cell to a relatively high bus voltage for the downstream dc-ac grid-connected inverter. To integrate the advantages of the high voltage gain of a switched-capacitor (SC) converter and excellent output regulation of a switching-mode dc-dc converter, a method of combining the two types of converters is proposed in this paper. The basic idea is that when the switch is turned on, the inductor is charged, and the capacitors are connected in series to supply the load, and when the switch is turned off, the inductor releases energy to charge multiple capacitors in parallel, whose voltages are controlled by a pulsewidth modulation technique. Thus, a high voltage gain of the dc-dc converter can be obtained with good regulation. Based on this principle, a series of new topologies are derived, and the operating principles and voltage gains of the proposed converters are analyzed. Finally, the design of the proposed converter is given, and the experiment results are provided to verify the theoretical analysis.

331 citations

Journal ArticleDOI
TL;DR: In this paper, a tutorial of the main results in switching-capacitor (SC) converters research and design can be found, with a focus on switching-mode converters without inductors and transformers.
Abstract: One of the main orientations in power electronics in the last decade has been the development of switching-mode converters without inductors and transformers. Light weight, small size and high power density are the result of using only switches and capacitors in the power stage of these converters. Thus, they serve as ideal power supplies for mobile electronic systems (e.g. cellular phones, personal digital assistants, and so forth). Switched-capacitor (SC) converters, with their large voltage conversion ratio, promise to be a response to such challenges of the 21st century as high-efficiency converters with low EMI emissions and the ability to realize steep step-down of the voltage (to 3 V or even a smaller supply voltage for integrated circuits) or steep step-up of the voltage for automotive industry or Internet services in the telecom industry. This paper is a tutorial of the main results in SC-converter research and design.

318 citations

Journal ArticleDOI
TL;DR: In this paper, the authors provide a deep understanding of the charge pumps behavior, to present useful models and key parameters and to organically and in details discuss the optimized design strategies, and an overview of the main different topologies is also included.
Abstract: Due to the continuous power supply reduction, charge pumps circuits are widely used in integrated circuits (ICs) devoted to several kind of applications such as smart power, nonvolatile memories, switched capacitor circuits, operational amplifiers, voltage regulators, SRAMs, LCD drivers, piezoelectric actuators, RF antenna switch controllers, etc. The main focus of this tutorial manuscript is to provide a deep understanding of the charge pumps behavior, to present useful models and key parameters and to organically and in details discuss the optimized design strategies. Finally, an overview of the main different topologies is also included.

306 citations

Journal ArticleDOI
TL;DR: In this article, a single phase switched-capacitor multilevel inverters (SCMLI) is presented, where the same two capacitors paralleled to a single dc source are connected to each other with a new extended configuration.
Abstract: In this paper, a novel platform for the single phase switched-capacitor multilevel inverters (SCMLIs) is presented. It has several advantages over the classical topologies, such as an appropriate boosting property, higher efficiency, lower number of required dc voltage sources, and other accompanying components with less complexity and lower cost. The basic structure of the proposed converter is capable of making nine-level of the output voltage under different kinds of loading conditions. Hereby, by using the same two capacitors paralleled to a single dc source, a switched-capacitor (SC) cell is made that contributes to boosting the value of the input voltage. In this case, the balanced voltage of the capacitors can be precisely provided on the basis of the series–parallel technique and the redundant switching states. Afterward, to reach the higher number of output voltage levels, two suggested SC cells are connected to each other with a new extended configuration. Therefore, by the use of a reasonable number of required power electronic devices, and also by utilizing only two isolated dc voltage sources, which their magnitudes can be designed based on either symmetric or asymmetric types, a 17- and 49-level of the output voltage are obtained. Based on the proposed extended configuration, a new generalized version of SCMLIs is also derived. To confirm the precise performance of the proposed topologies, apart from the theoretical analysis and a complete comparison, several simulation and experimental results are also given.

303 citations

Book
01 Jan 1982
TL;DR: In this paper, Bilinear Transfer Functions and Frequency Response are discussed in the context of Op-Amp Oscillators, and a ladder design with simulated elements is presented.
Abstract: 1. Introduction 2. Resistor Op-Amp Circuits 3. Bilinear Transfer Functions and Frequency Response 4. Cascade Design with First-Order Circuits 5. The Biquad Circuit 6. Butterworth Low-Pass Filters 7. Butterworth Band-Pass Filters 8. The Chebyshev Response 9. Sensitivity 10. Delay Filters 11. Frequency Transformation 12. Highpass and Band-Elimination Filters 13. Inverse Chebyshev and Cauer Filters 14. Prototype and Frequency-Transformed Ladders 15. Ladder Design with Simulated Elements 16. Leapfrog Simulation of Ladders 17. Switched Capacitor Filters 18. Delay Equalization 19. Op-Amp Oscillators 20. Better Op-Amp Models APPENDIX: SCALING REFERENCES

300 citations


Network Information
Related Topics (5)
CMOS
81.3K papers, 1.1M citations
86% related
Capacitor
166.6K papers, 1.4M citations
85% related
Electronic circuit
114.2K papers, 971.5K citations
85% related
Voltage
296.3K papers, 1.7M citations
83% related
Integrated circuit
82.7K papers, 1M citations
83% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023118
2022333
2021342
2020452
2019443
2018439