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A Low-Ripple Charge Pump based on a Parallelized Ring Oscillator with Latches

Title
A Low-Ripple Charge Pump based on a Parallelized Ring Oscillator with Latches
Authors
MinKyung Kim
DGIST Authors
Kim, MinKyung; Kung, JaehaLee, Junghyup
Advisor(s)
이정협
Co-Advisor(s)
Jaeha Kung
Issue Date
2019
Available Date
2020-02-28
Degree Date
2019-08
Type
Thesis
Description
Charge Pump, Low ripple, High efficiency
Abstract
As IoT(Internet of Things) , circuit system also requires a high degree of integration. The power supply is essential for the circuit, and the power supply circuit is also required to be small in size. Switching DC-DC converters or Lin-ear DC-DC converters, also known as power supply circuits, are not suitable for powering integrated circuits because of their large size. In this paper, a high efficiency switched-capacitor based charge pump for integrated circuits is dis-cussed. It also has the advantage of using a multi-phase structure to keep the output voltage constant.|본 논문에서는 출력 전압을 가변하는 병렬 구조의 자가 발진 전압 승압 회로를 제안하였다. 집적회로에 전력을 공급하는 데 있어서 clock 신호가 필수적이었으나, clock 신호 대신 ring oscillator를 이용해 자체적으로 clock신호를 만듦으로써 충전 커패시터에 충전 및 방전이 가능해져 전력 손실을 줄일 수 있다. 또한, multi-phase 구조에 latch를 더해 병렬 연결된 ring oscillator가 서로 반대 위상으로 동작해 output ripple을 줄임으로써 별도의 필터나 LDO 없이 부하에 clean한 DC 전압을 줄 수 있다. 또한, 지연 cell의 지연시간을 조절함으로써 출력 전압 및 해당 부하의 최고 전력 효율을 가지는 지점을 찾을 수 있다. 본 논문에서는 최고 82%의 전력 효율을 달성했고, 최소 output ripple은 출력 전압의 0.15%를 달성하였다.
Table Of Contents
Abstract i List of Contents ii List of Tables iii List of Figures vi Ⅰ. Introduction 2 1.1 DC-DC Converter 3 1.2 Conventional Charge Pump 5 1.2.1 Cockcroft-Walton Charge Pump 5 1.2.2. Dickson Charge Pump 6 1.2.3. Cross-Coupled Voltage Doubler 8 II. Background Information 10 2.1 Power Efficiency 10 III. Proposed System 11 ⅠV. Schematic Design and Layout 17 V. Results 23 VI. Conclusion 27 VII. References 28
URI
http://dgist.dcollection.net/common/orgView/200000216335
http://hdl.handle.net/20.500.11750/10478
DOI
10.22677/thesis.200000216335
Degree
Master
Department
Department of Information and Communication Engineering
University
DGIST
Related Researcher
  • Author Kung, Jaeha Intelligent Digital Systems Lab
  • Research Interests 딥러닝, 가속하드웨어, 저전력 하드웨어, 고성능 시스템
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Collection:
Department of Information and Communication EngineeringThesesMaster


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