JPS57103417A - Gain control circuit - Google Patents

Gain control circuit

Info

Publication number
JPS57103417A
JPS57103417A JP13098481A JP13098481A JPS57103417A JP S57103417 A JPS57103417 A JP S57103417A JP 13098481 A JP13098481 A JP 13098481A JP 13098481 A JP13098481 A JP 13098481A JP S57103417 A JPS57103417 A JP S57103417A
Authority
JP
Japan
Prior art keywords
trs
transistor
collectors
collector
base
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
JP13098481A
Other languages
Japanese (ja)
Inventor
Nobukazu Hosoya
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.)
Sanyo Electric Co Ltd
Sanyo Denki Co Ltd
Original Assignee
Sanyo Electric Co Ltd
Sanyo Denki Co 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 Sanyo Electric Co Ltd, Sanyo Denki Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP13098481A priority Critical patent/JPS57103417A/en
Publication of JPS57103417A publication Critical patent/JPS57103417A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
    • H03G1/0017—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal the device being at least one of the amplifying solid state elements of the amplifier
    • H03G1/0023—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal the device being at least one of the amplifying solid state elements of the amplifier in emitter-coupled or cascode amplifiers

Landscapes

  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE:To improve the degradation of the high band frequency characteristics due to the capacity between the collector and the base of a controlling transistor, by connecting the third transistor to the first and the second transistors of a differential pair and connecting the fourth and the fifth transistor to the third transistor. CONSTITUTION:The collector of the thrid transistor (TR) T3 is connected to the emitter common connection point of the first and the second TRs T1 and T2 of a differential pair, and emitters of the fourth and fifth TRs T4 and T5 are connected commonly to the TR T3, and collectors of TRs T4 and T5 are connected to connection points between collectors of TRs T1 and T2 and load resistances R1 and R2 respectively. The collector of the sixth TR T6 for constant current supply is connected to the emitter common connection point of TRs T3-T5, and a control voltage Vc is applied across the base of the TR T3 and bases of TRs T4 and T5, and a gain controlled differential output Vout is taken out from between collectors of TRs T1 and T2.
JP13098481A 1981-08-20 1981-08-20 Gain control circuit Pending JPS57103417A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13098481A JPS57103417A (en) 1981-08-20 1981-08-20 Gain control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13098481A JPS57103417A (en) 1981-08-20 1981-08-20 Gain control circuit

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP55124938A Division JPS5748815A (en) 1980-09-08 1980-09-08 Picture quality adjusting circuit

Publications (1)

Publication Number Publication Date
JPS57103417A true JPS57103417A (en) 1982-06-28

Family

ID=15047191

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13098481A Pending JPS57103417A (en) 1981-08-20 1981-08-20 Gain control circuit

Country Status (1)

Country Link
JP (1) JPS57103417A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59125109A (en) * 1982-12-30 1984-07-19 Rohm Co Ltd Gain variable amplifier
FR2642918A1 (en) * 1989-02-09 1990-08-10 Cit Alcatel Wide-band amplifier circuit with automatic gain control

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50140242A (en) * 1974-04-30 1975-11-10
JPS534787A (en) * 1976-07-05 1978-01-17 Nichibi Kk Cation exchange fibers and its manufacture

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50140242A (en) * 1974-04-30 1975-11-10
JPS534787A (en) * 1976-07-05 1978-01-17 Nichibi Kk Cation exchange fibers and its manufacture

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59125109A (en) * 1982-12-30 1984-07-19 Rohm Co Ltd Gain variable amplifier
FR2642918A1 (en) * 1989-02-09 1990-08-10 Cit Alcatel Wide-band amplifier circuit with automatic gain control

Similar Documents

Publication Publication Date Title
GB1516126A (en) Network which exhibits an output independent of its input supply
EP0044339B1 (en) Current mirror circuit
US4274060A (en) Signal change-over amplifier
JPS5728411A (en) Voltage controlled type variable gain circuit
JPS6472605A (en) Feedback amplifier
ES478764A1 (en) Amplifier arrangement with variable gain factor
JPS57103417A (en) Gain control circuit
US5130567A (en) Bipolar transistor arrangement with distortion compensation
JPS57204611A (en) Voltage follower circuit
US5497074A (en) Balanced voltage-to-current converter with quiescent current control
JPS5592006A (en) Amplifier
JPS6450604A (en) High gain amplifier using two current mirrors
JPS56137717A (en) Current miller circuit
JPS5767305A (en) Limiter circuit
JPS61157108A (en) Voltage-current converting circuit
JPS57181215A (en) Variable gain circuit
JPS55107312A (en) Current mirror circuit
JPS57181216A (en) Variable gain circuit
JPS54157459A (en) Amplifier circuit
JPS6112109A (en) Current mirror circuit
JPS59131210A (en) Gain controlling amplifier
JPS56107609A (en) Push-pull amplifying circuit
JPS57143908A (en) Variable gain amplifying circuit
JPS57203114A (en) Power supply circuit
JPS5786060A (en) Meter voltage amplifier circuit