CN112042128A - 电容式模数转换器、模数转换***、芯片及设备 - Google Patents

电容式模数转换器、模数转换***、芯片及设备 Download PDF

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Publication number
CN112042128A
CN112042128A CN201980000473.2A CN201980000473A CN112042128A CN 112042128 A CN112042128 A CN 112042128A CN 201980000473 A CN201980000473 A CN 201980000473A CN 112042128 A CN112042128 A CN 112042128A
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Prior art keywords
capacitor
capacitors
comparator
output end
voltage
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CN201980000473.2A
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CN112042128B (zh
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范硕
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Shenzhen Goodix Technology Co Ltd
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Shenzhen Goodix Technology Co Ltd
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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H03M1/34—Analogue value compared with reference values
    • H03M1/38—Analogue value compared with reference values sequentially only, e.g. successive approximation type
    • H03M1/44—Sequential comparisons in series-connected stages with change in value of analogue signal
    • H03M1/442—Sequential comparisons in series-connected stages with change in value of analogue signal using switched capacitors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H03M1/34—Analogue value compared with reference values
    • H03M1/38—Analogue value compared with reference values sequentially only, e.g. successive approximation type
    • H03M1/46—Analogue value compared with reference values sequentially only, e.g. successive approximation type with digital/analogue converter for supplying reference values to converter
    • H03M1/466—Analogue value compared with reference values sequentially only, e.g. successive approximation type with digital/analogue converter for supplying reference values to converter using switched capacitors
    • H03M1/468—Analogue value compared with reference values sequentially only, e.g. successive approximation type with digital/analogue converter for supplying reference values to converter using switched capacitors in which the input S/H circuit is merged with the feedback DAC array
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/66—Digital/analogue converters
    • H03M1/74—Simultaneous conversion
    • H03M1/80—Simultaneous conversion using weighted impedances
    • H03M1/802—Simultaneous conversion using weighted impedances using capacitors, e.g. neuron-mos transistors, charge coupled devices
    • H03M1/804—Simultaneous conversion using weighted impedances using capacitors, e.g. neuron-mos transistors, charge coupled devices with charge redistribution

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Power Engineering (AREA)
  • Analogue/Digital Conversion (AREA)

Abstract

本申请提供一种电容式模数转换器、模数转换***、芯片和设备，该电容式模数转换器包括第一电容阵列，包括N个第一电容器组，N个第一电容器组包括M个第一电容器，M为大于N的正整数；M个第一开关，分别与M个第一电容器的第一极板一一对应连接，以使逐次逼近逻辑控制器通过控制M个第一开关，控制M个第一电容器的第一极板与电压生成电路输出端、第一采样电压输出端的连接；比较器，包括第一输入端、第二输入端和输出端；逐次逼近逻辑控制器，与比较器的输出端连接，用于根据比较器的输出端输出的比较结果，控制M个第一开关。不仅实现了模数转换，而且提高了模数转换的精确度。

Description

PCT国内申请，说明书已公开。

Claims (26)

  1. PCT国内申请，权利要求书已公开。
CN201980000473.2A 2019-04-03 2019-04-03 电容式模数转换器、模数转换***、芯片及设备 Active CN112042128B (zh)

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PCT/CN2019/081292 WO2020199165A1 (zh) 2019-04-03 2019-04-03 电容式模数转换器、模数转换***、芯片及设备

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EP (1) EP3800790A4 (zh)
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WO (1) WO2020199165A1 (zh)

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CN112968704B (zh) * 2021-02-03 2022-07-29 电子科技大学 基于暂态电容切换方式的逐次逼近型模数转换器量化方法

Citations (5)

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Publication number Priority date Publication date Assignee Title
US8421658B1 (en) * 2011-11-24 2013-04-16 Hong Kong Applied Science & Technology Research Institute Company, Ltd. Parallel pipelined calculation of two calibration values during the prior conversion cycle in a successive-approximation-register analog-to-digital converter (SAR-ADC)
CN103905049A (zh) * 2014-03-11 2014-07-02 中国科学院半导体研究所 一种高速快闪加交替比较式逐次逼近模数转换器
CN104113341A (zh) * 2014-07-16 2014-10-22 西安电子科技大学 一种12位中等速率逐次逼近型模数转换器
US9461665B1 (en) * 2015-08-24 2016-10-04 Korea University Research And Business Foundation Successive approximated register analog-to-digital converter and conversion method thereof
US9553599B1 (en) * 2016-02-08 2017-01-24 Analog Devices, Inc. Techniques for reducing offsets in an analog to digital converter

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7209069B2 (en) * 2005-04-13 2007-04-24 Sigmatel, Inc. Successive approximation analog-to-digital converter with current steered digital-to-analog converter
CN204376879U (zh) * 2015-02-03 2015-06-03 国网重庆市电力公司电力科学研究院 具有混合型dac电容阵列结构的sar adc
CN106301377A (zh) * 2015-06-04 2017-01-04 智原微电子(苏州)有限公司 逐次逼近型模拟至数字转换器
KR102289432B1 (ko) * 2017-05-02 2021-08-11 에스케이하이닉스 주식회사 연속적인 근사 레지스터 아날로그 디지털 변환 장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8421658B1 (en) * 2011-11-24 2013-04-16 Hong Kong Applied Science & Technology Research Institute Company, Ltd. Parallel pipelined calculation of two calibration values during the prior conversion cycle in a successive-approximation-register analog-to-digital converter (SAR-ADC)
CN103905049A (zh) * 2014-03-11 2014-07-02 中国科学院半导体研究所 一种高速快闪加交替比较式逐次逼近模数转换器
CN104113341A (zh) * 2014-07-16 2014-10-22 西安电子科技大学 一种12位中等速率逐次逼近型模数转换器
US9461665B1 (en) * 2015-08-24 2016-10-04 Korea University Research And Business Foundation Successive approximated register analog-to-digital converter and conversion method thereof
US9553599B1 (en) * 2016-02-08 2017-01-24 Analog Devices, Inc. Techniques for reducing offsets in an analog to digital converter

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Publication number Publication date
EP3800790A4 (en) 2021-10-06
CN112042128B (zh) 2022-03-15
US20200412375A1 (en) 2020-12-31
US11159172B2 (en) 2021-10-26
EP3800790A1 (en) 2021-04-07
WO2020199165A1 (zh) 2020-10-08

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