JPS5455155A - Analog-to-digital converter - Google Patents

Analog-to-digital converter

Info

Publication number
JPS5455155A
JPS5455155A JP12136677A JP12136677A JPS5455155A JP S5455155 A JPS5455155 A JP S5455155A JP 12136677 A JP12136677 A JP 12136677A JP 12136677 A JP12136677 A JP 12136677A JP S5455155 A JPS5455155 A JP S5455155A
Authority
JP
Japan
Prior art keywords
voltage
fixed point
comparator
reference voltage
output
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.)
Pending
Application number
JP12136677A
Other languages
Japanese (ja)
Inventor
Kazuo Murano
Kiichi Matsuda
Yutaka Fukuda
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP12136677A priority Critical patent/JPS5455155A/en
Publication of JPS5455155A publication Critical patent/JPS5455155A/en
Pending legal-status Critical Current

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  • Analogue/Digital Conversion (AREA)

Abstract

PURPOSE: To remove DC drift components by providing a comparator which detects the difference in level between a comparison voltage appearing at any fixed point of a voltage-dividing resistance and a prescribed reference voltage which should appear at the fixed point.
CONSTITUTION: This converter is provided with comparator 21 which receives a comparison voltage at one fixed point P of voltage-dividing resistance group 12 via its lst input terminal and regular reference voltage Vr which should be at fixed point P via its 2nd input terminal, integrator 22 for th smoothing DC-conversion of the output of comparator 21, and bias circuit 23 supplied with the output of integrator 22 as a feedback input. Now, if voltage Vp at fixed point P drifts from reference voltage Vr toward the positive side, bias circuit 23 level-shifts the output voltages of D-A converter 14 i.e. VH and VL to the negative sides wholly
COPYRIGHT: (C)1979,JPO&Japio
JP12136677A 1977-10-12 1977-10-12 Analog-to-digital converter Pending JPS5455155A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12136677A JPS5455155A (en) 1977-10-12 1977-10-12 Analog-to-digital converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12136677A JPS5455155A (en) 1977-10-12 1977-10-12 Analog-to-digital converter

Publications (1)

Publication Number Publication Date
JPS5455155A true JPS5455155A (en) 1979-05-02

Family

ID=14809459

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12136677A Pending JPS5455155A (en) 1977-10-12 1977-10-12 Analog-to-digital converter

Country Status (1)

Country Link
JP (1) JPS5455155A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS586330U (en) * 1981-07-06 1983-01-17 岡谷電機産業株式会社 illuminated switch
JPS6457824A (en) * 1987-08-28 1989-03-06 Hitachi Ltd Serial/parallel ad converter
JPH0250523A (en) * 1988-08-12 1990-02-20 Hitachi Ltd A/d converting circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS586330U (en) * 1981-07-06 1983-01-17 岡谷電機産業株式会社 illuminated switch
JPS6457824A (en) * 1987-08-28 1989-03-06 Hitachi Ltd Serial/parallel ad converter
JPH0250523A (en) * 1988-08-12 1990-02-20 Hitachi Ltd A/d converting circuit

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