JPS55165027A - A/d converter circuit - Google Patents

A/d converter circuit

Info

Publication number
JPS55165027A
JPS55165027A JP7217279A JP7217279A JPS55165027A JP S55165027 A JPS55165027 A JP S55165027A JP 7217279 A JP7217279 A JP 7217279A JP 7217279 A JP7217279 A JP 7217279A JP S55165027 A JPS55165027 A JP S55165027A
Authority
JP
Japan
Prior art keywords
polarity
train
terminal
charge
capacitor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP7217279A
Other languages
Japanese (ja)
Other versions
JPS6011491B2 (en
Inventor
Atsushi Iwata
Hiroyuki Kikuchi
Kuniharu Uchimura
Yasuyuki Matsutani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP7217279A priority Critical patent/JPS6011491B2/en
Publication of JPS55165027A publication Critical patent/JPS55165027A/en
Publication of JPS6011491B2 publication Critical patent/JPS6011491B2/en
Expired legal-status Critical Current

Links

Classifications

    • 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

Abstract

PURPOSE:To make unipolarization of the reference voltage and to enable simplified switch, by switching the direction of charge to the capacitor train depending on the polarity of input voltage and performing the sequential comparison after charge with a given polarity. CONSTITUTION:The sampling switches (SW)71, 72 connecting the common electrode of each capacitance of the capacitor train 2 to the input terminal 1 and the ground G terminal, and SW73, 74 connecting another electrode of the capacitor train 2 to the terminal 1 and ther terminal G respectively via the switching SW71 for D/A conversion are provided. Further, first the input voltage Vin is fed to the comparator 5 by turning on SW71 and off the SW72-74, and after deciding the polarity of input, SW73, 72 are ON when positive polarity and SW71, 74 are OFF, and when negative polarity, SW71, 74 are ON and SW72, 73 are OFF, to charge up the capacitor train 2. Next, according to the specified algorithm, under the control of the sequential approximate control circuit 9, the SW train 3 is switched and A/D conversion is made with sequential comparison with the comparator 5. Thus, the reference voltage Vref can be made to unipolarization and the SW3 can be made simple.
JP7217279A 1979-06-11 1979-06-11 AD conversion circuit Expired JPS6011491B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7217279A JPS6011491B2 (en) 1979-06-11 1979-06-11 AD conversion circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7217279A JPS6011491B2 (en) 1979-06-11 1979-06-11 AD conversion circuit

Publications (2)

Publication Number Publication Date
JPS55165027A true JPS55165027A (en) 1980-12-23
JPS6011491B2 JPS6011491B2 (en) 1985-03-26

Family

ID=13481535

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7217279A Expired JPS6011491B2 (en) 1979-06-11 1979-06-11 AD conversion circuit

Country Status (1)

Country Link
JP (1) JPS6011491B2 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57123732A (en) * 1981-01-26 1982-08-02 Oki Electric Ind Co Ltd Digital-to-analog converting circuit
JPS57186828A (en) * 1981-05-04 1982-11-17 Texas Instruments Inc Data acquisition system with self calibration function and method of calibracting same
JPS5885627A (en) * 1981-11-03 1983-05-23 テキサス・インスツルメンツ・インコ−ポレイテツド Analog/digital converting circuit
JPS58148517A (en) * 1982-03-01 1983-09-03 Oki Electric Ind Co Ltd Encoder
JPS62157422A (en) * 1985-12-19 1987-07-13 エツセジ−エツセ　ミクロエレツトロニカ　ソチエタ　ペル　アノニマ Method and apparatus for correcting off-set voltage in analog-digital converter
US5589785A (en) * 1994-04-29 1996-12-31 Analog Devices, Inc. Low-voltage CMOS comparator
JP4813568B2 (en) * 2006-02-02 2011-11-09 ナショナル ユニヴァーシティー オブ シンガポール Analog-to-digital converter
WO2017086188A1 (en) * 2015-11-20 2017-05-26 株式会社村田製作所 Sensor device
WO2017179508A1 (en) * 2016-04-15 2017-10-19 株式会社村田製作所 A/d converter and sensor device equipped with same

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57123732A (en) * 1981-01-26 1982-08-02 Oki Electric Ind Co Ltd Digital-to-analog converting circuit
JPH0348700B2 (en) * 1981-05-04 1991-07-25 Texas Instruments Inc
JPS57186828A (en) * 1981-05-04 1982-11-17 Texas Instruments Inc Data acquisition system with self calibration function and method of calibracting same
JPS5885627A (en) * 1981-11-03 1983-05-23 テキサス・インスツルメンツ・インコ−ポレイテツド Analog/digital converting circuit
JPH0376050B2 (en) * 1981-11-03 1991-12-04 Texas Instruments Inc
JPS58148517A (en) * 1982-03-01 1983-09-03 Oki Electric Ind Co Ltd Encoder
JPS62157422A (en) * 1985-12-19 1987-07-13 エツセジ−エツセ　ミクロエレツトロニカ　ソチエタ　ペル　アノニマ Method and apparatus for correcting off-set voltage in analog-digital converter
US5589785A (en) * 1994-04-29 1996-12-31 Analog Devices, Inc. Low-voltage CMOS comparator
US5600275A (en) * 1994-04-29 1997-02-04 Analog Devices, Inc. Low-voltage CMOS comparator with offset cancellation
JP4813568B2 (en) * 2006-02-02 2011-11-09 ナショナル ユニヴァーシティー オブ シンガポール Analog-to-digital converter
WO2017086188A1 (en) * 2015-11-20 2017-05-26 株式会社村田製作所 Sensor device
JPWO2017086188A1 (en) * 2015-11-20 2018-09-20 株式会社村田製作所 Sensor device
US11196441B2 (en) 2015-11-20 2021-12-07 Murata Manufacturing Co., Ltd. Sensor device including a capacitive charge output device connected to an A/D converter
WO2017179508A1 (en) * 2016-04-15 2017-10-19 株式会社村田製作所 A/d converter and sensor device equipped with same
US10523227B2 (en) 2016-04-15 2019-12-31 Murata Manufacturing Co., Ltd. A/D converter and sensor apparatus including the same

Also Published As

Publication number Publication date
JPS6011491B2 (en) 1985-03-26

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