JPS5455156A - Analog-to-digital converter - Google Patents

Analog-to-digital converter

Info

Publication number
JPS5455156A
JPS5455156A JP12136777A JP12136777A JPS5455156A JP S5455156 A JPS5455156 A JP S5455156A JP 12136777 A JP12136777 A JP 12136777A JP 12136777 A JP12136777 A JP 12136777A JP S5455156 A JPS5455156 A JP S5455156A
Authority
JP
Japan
Prior art keywords
current
buffer amplifier
source
voltage
limit buffer
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
JP12136777A
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 JP12136777A priority Critical patent/JPS5455156A/en
Publication of JPS5455156A publication Critical patent/JPS5455156A/en
Pending legal-status Critical Current

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  • Analogue/Digital Conversion (AREA)

Abstract

PURPOSE: To make it possible to generate a highly precise refererence level by providing a current supply source which supplies a current from an upper-limit buffer amplifier to a lower-limit buffer amplifier via a voltage-dividing resistance.
CONSTITUTION: When change-over circuit 18 acquires constant-current source 17-1, switches S1 and S1' both turn ON at the same time by control lines from change-over circuit 18. As a result, a current which should be fed to voltage-dividing resistance 12 usually from upper-limit buffer amplifier 15-H toward lower-limit buffer amplifier 15-L is fed with the assitance of the lst current supply source 21 and the lst current absorption source 21'. Therefore, those current supply source 21 and current absorption source 21' feed a current to voltage-dividing resistance 12 as substitute for buffer amplifiers 15-H and 15-L which should have done it usually
COPYRIGHT: (C)1979,JPO&Japio
JP12136777A 1977-10-12 1977-10-12 Analog-to-digital converter Pending JPS5455156A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12136777A JPS5455156A (en) 1977-10-12 1977-10-12 Analog-to-digital converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12136777A JPS5455156A (en) 1977-10-12 1977-10-12 Analog-to-digital converter

Publications (1)

Publication Number Publication Date
JPS5455156A true JPS5455156A (en) 1979-05-02

Family

ID=14809482

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12136777A Pending JPS5455156A (en) 1977-10-12 1977-10-12 Analog-to-digital converter

Country Status (1)

Country Link
JP (1) JPS5455156A (en)

Cited By (4)

* 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
JPS5871725A (en) * 1981-10-26 1983-04-28 Yokogawa Hewlett Packard Ltd Analog-digital converter
JPS5871722A (en) * 1981-10-26 1983-04-28 Yokogawa Hewlett Packard Ltd Digital-analog converter
JPS58104526A (en) * 1981-10-09 1983-06-22 アナログ・デバイセス・インコ−ポレ−テツド Two-stage a/d converter

Cited By (4)

* 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
JPS58104526A (en) * 1981-10-09 1983-06-22 アナログ・デバイセス・インコ−ポレ−テツド Two-stage a/d converter
JPS5871725A (en) * 1981-10-26 1983-04-28 Yokogawa Hewlett Packard Ltd Analog-digital converter
JPS5871722A (en) * 1981-10-26 1983-04-28 Yokogawa Hewlett Packard Ltd Digital-analog converter

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