JPS562712A - Direct current amplifier - Google Patents

Direct current amplifier

Info

Publication number
JPS562712A
JPS562712A JP7815679A JP7815679A JPS562712A JP S562712 A JPS562712 A JP S562712A JP 7815679 A JP7815679 A JP 7815679A JP 7815679 A JP7815679 A JP 7815679A JP S562712 A JPS562712 A JP S562712A
Authority
JP
Japan
Prior art keywords
switch
subamplifier
amplifier
capacitor
main amplifier
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
JP7815679A
Other languages
Japanese (ja)
Other versions
JPS6138883B2 (en
Inventor
Kazuo Kato
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP7815679A priority Critical patent/JPS562712A/en
Publication of JPS562712A publication Critical patent/JPS562712A/en
Publication of JPS6138883B2 publication Critical patent/JPS6138883B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
    • H03F1/303—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters using a switching device

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

PURPOSE:To improve the precision of a DC amplifier, by performing offset compensation of the subamplifier itselt which performs offset compensation of a main amplifier. CONSTITUTION:Connection point P between resistance 210 and capacitor 220 forming integrator 250 and inversion input terminal 200A of subamplifier 200 are connected through offset compensating capacitor 240, and input terminal 220A and output terminal 200C of subamplifier 200 are connected through switch S25. Output end 100C of main amplifier 100 and resistance 210 are connected through selector switch S30. Then, switch S30 is switched to contact (a) and switch S25 is turned on to charge the offset voltage of subamplfier 200 to capacitor 240. After that, switch S25 is turned off and S30 is switched to contact (b), thus performing offset compensation of the subamplifier and the main amplifier. As a reuslt, a high- precision DC amplifier can be obtained.
JP7815679A 1979-06-22 1979-06-22 Direct current amplifier Granted JPS562712A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7815679A JPS562712A (en) 1979-06-22 1979-06-22 Direct current amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7815679A JPS562712A (en) 1979-06-22 1979-06-22 Direct current amplifier

Publications (2)

Publication Number Publication Date
JPS562712A true JPS562712A (en) 1981-01-13
JPS6138883B2 JPS6138883B2 (en) 1986-09-01

Family

ID=13654047

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7815679A Granted JPS562712A (en) 1979-06-22 1979-06-22 Direct current amplifier

Country Status (1)

Country Link
JP (1) JPS562712A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59116683A (en) * 1982-12-22 1984-07-05 株式会社精工舎 Color display

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59116683A (en) * 1982-12-22 1984-07-05 株式会社精工舎 Color display
JPH0152733B2 (en) * 1982-12-22 1989-11-09 Seikosha Kk

Also Published As

Publication number Publication date
JPS6138883B2 (en) 1986-09-01

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