JPH0398517U - - Google Patents

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Publication number
JPH0398517U
JPH0398517U JP619690U JP619690U JPH0398517U JP H0398517 U JPH0398517 U JP H0398517U JP 619690 U JP619690 U JP 619690U JP 619690 U JP619690 U JP 619690U JP H0398517 U JPH0398517 U JP H0398517U
Authority
JP
Japan
Prior art keywords
circuit
differential amplifier
amplifier
constant current
transistor
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
JP619690U
Other languages
Japanese (ja)
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 filed Critical
Priority to JP619690U priority Critical patent/JPH0398517U/ja
Publication of JPH0398517U publication Critical patent/JPH0398517U/ja
Pending legal-status Critical Current

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  • Amplifiers (AREA)

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図及び第２図はこの考案に係る差動増幅器
のバイアス安定化回路の実施例を示し、第１図は
実施例１の回路図、第２図は実施例２の回路図で
ある。第３図及び第４図は従来例を示し、第３図
は従来例１の回路図、第４図は従来例２の回路図
である。 主な符号の説明、１……演算増幅器、Ｑ１〜Ｑ
５，Ｑ１１〜Ｑ１８……トランジスタ、Ｅ１……
基準電圧源、Ｒ１〜Ｒ９……抵抗、Ｃ１……コン
デンサ、Ｄ１……ダイオード、Ｄ２，Ｄ３……ツ
エナーダイオード。 1 and 2 show embodiments of a bias stabilizing circuit for a differential amplifier according to this invention, FIG. 1 is a circuit diagram of the first embodiment, and FIG. 2 is a circuit diagram of the second embodiment. 3 and 4 show conventional examples, FIG. 3 is a circuit diagram of conventional example 1, and FIG. 4 is a circuit diagram of conventional example 2. Explanation of main symbols, 1... operational amplifier, Q 1 ~Q
5 , Q11 to Q18 ...transistor, E1 ...
Reference voltage source, R1 to R9 ...resistance, C1 ...capacitor, D1 ...diode, D2 , D3 ...Zener diode.

Claims (1)

【実用新案登録請求の範囲】 第１のトランジスタと、第２のトランジスタの
エミツタを接続しエミツタ回路に前記２つのトラ
ンジスタのコレクタ電流を決定する定電流回路を
設けて成る差動増幅器において、 前記差動増幅器の定電流回路に差動増幅器より
出力する２つの差動出力信号を合成する加算器と
、加算器から出力する直流成分を増幅する増幅器
とを設け、前記増幅器より得られた直流成分の信
号により差動増幅器の定電流回路の電流値を制御
するように構成したことを特徴とする差動増幅器
のバイアス安定化回路。[Claims for Utility Model Registration] A differential amplifier comprising a constant current circuit connecting the emitters of a first transistor and a second transistor and determining collector currents of the two transistors in the emitter circuit, The constant current circuit of the dynamic amplifier is provided with an adder that combines two differential output signals output from the differential amplifier, and an amplifier that amplifies the DC component output from the adder. A bias stabilization circuit for a differential amplifier, characterized in that the circuit is configured to control the current value of a constant current circuit of the differential amplifier using a signal.
JP619690U 1990-01-29 1990-01-29 Pending JPH0398517U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP619690U JPH0398517U (en) 1990-01-29 1990-01-29

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP619690U JPH0398517U (en) 1990-01-29 1990-01-29

Publications (1)

Publication Number Publication Date
JPH0398517U true JPH0398517U (en) 1991-10-14

Family

ID=31509874

Family Applications (1)

Application Number Title Priority Date Filing Date
JP619690U Pending JPH0398517U (en) 1990-01-29 1990-01-29

Country Status (1)

Country Link
JP (1) JPH0398517U (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5949008A (en) * 1982-09-14 1984-03-21 Fujitsu Ltd Differential amplifying circuit of field effect transistor
JPS6097709A (en) * 1983-11-02 1985-05-31 Hitachi Ltd Preamplifier

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5949008A (en) * 1982-09-14 1984-03-21 Fujitsu Ltd Differential amplifying circuit of field effect transistor
JPS6097709A (en) * 1983-11-02 1985-05-31 Hitachi Ltd Preamplifier

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