JPS57206106A - Dc amplifier - Google Patents

Dc amplifier

Info

Publication number
JPS57206106A
JPS57206106A JP56080877A JP8087781A JPS57206106A JP S57206106 A JPS57206106 A JP S57206106A JP 56080877 A JP56080877 A JP 56080877A JP 8087781 A JP8087781 A JP 8087781A JP S57206106 A JPS57206106 A JP S57206106A
Authority
JP
Japan
Prior art keywords
amplifier
band
differential
input
amplified
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
JP56080877A
Other languages
Japanese (ja)
Other versions
JPS6237844B2 (en
Inventor
Akira Kaneko
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 Denshi KK
Original Assignee
Hitachi Denshi KK
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 Denshi KK filed Critical Hitachi Denshi KK
Priority to JP56080877A priority Critical patent/JPS57206106A/en
Publication of JPS57206106A publication Critical patent/JPS57206106A/en
Publication of JPS6237844B2 publication Critical patent/JPS6237844B2/ja
Granted legal-status Critical Current

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  • Amplifiers (AREA)

Abstract

PURPOSE: To obtain a DC amplifier which has a gain constant from the DC through a high frequency, by realizing the characteristics of a DC band with an FET input differential amplifier as well as the characteristics of an AC band with the amplifying function of two FETs and the characteristics of a differential wide-band amplifier.
CONSTITUTION: The input signal of one side supplied through an input terminal 1 is amplified by an FET input differential amplifier 8 and then applied to a differential wide-band amplifier 7. The input signal of the other side is applied to the amplifier 7 after the AC component obtained by eliminating the DC component through a capacitor 5 is amplified by a differential amplifier consisting of the FETs 13 and 14, and then multiplied by the output the amplifier 8 to be amplified. Then the feedback is applied to the negative polarity input terminal of the amplifier and the gate terminal of the FET14 from the output of the amplifier 7 by the resistances 11 and 12. Thus a prescribed amplification factor is secured between the input terminal 1 and an output terminal 4.
COPYRIGHT: (C)1982,JPO&Japio
JP56080877A 1981-05-29 1981-05-29 Dc amplifier Granted JPS57206106A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56080877A JPS57206106A (en) 1981-05-29 1981-05-29 Dc amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56080877A JPS57206106A (en) 1981-05-29 1981-05-29 Dc amplifier

Publications (2)

Publication Number Publication Date
JPS57206106A true JPS57206106A (en) 1982-12-17
JPS6237844B2 JPS6237844B2 (en) 1987-08-14

Family

ID=13730571

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56080877A Granted JPS57206106A (en) 1981-05-29 1981-05-29 Dc amplifier

Country Status (1)

Country Link
JP (1) JPS57206106A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0470104A (en) * 1990-07-11 1992-03-05 Hitachi Ltd Wide-band amplifier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0470104A (en) * 1990-07-11 1992-03-05 Hitachi Ltd Wide-band amplifier

Also Published As

Publication number Publication date
JPS6237844B2 (en) 1987-08-14

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