JPS57162810A - Amplifying circuit - Google Patents

Amplifying circuit

Info

Publication number
JPS57162810A
JPS57162810A JP4795181A JP4795181A JPS57162810A JP S57162810 A JPS57162810 A JP S57162810A JP 4795181 A JP4795181 A JP 4795181A JP 4795181 A JP4795181 A JP 4795181A JP S57162810 A JPS57162810 A JP S57162810A
Authority
JP
Japan
Prior art keywords
source
resistors
diode
switching element
gate
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
JP4795181A
Other languages
Japanese (ja)
Inventor
Akira Sato
Yoshikazu Tanaka
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP4795181A priority Critical patent/JPS57162810A/en
Publication of JPS57162810A publication Critical patent/JPS57162810A/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
    • H03G1/0029—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 using FETs

Landscapes

  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE:To make turning on/off of a switching element controllable in accordance with the gain, by inserting a switching element between a bias circuit of the 1st gate and that of the source of a 4-pole FET. CONSTITUTION:Resistors R7, R8 and R9 for the 1st gate bias are connected in series between a power supply terminal 4 and ground, and the connecting point of the resistors R7 and R8 is connected to the 1st gate G1 of a GaAsFET6. The connecting point of the resistors R8 and R9 is connected to a source S of the FET6 via a diode 9 being a switching element, and this source S is grounded via a source ground resistor R10. In this case, the diode 9 turns off at full gain by setting each constant of resistors R7-R10, and on the other hand, AGC is slightly reduced and a drain current decreases slightly, allowing to turn on the diode 9. With this constitution, since the diode 9 turns off at full gain, the source voltage of the FET6 can completely be biased with the resistor R10.
JP4795181A 1981-03-31 1981-03-31 Amplifying circuit Pending JPS57162810A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4795181A JPS57162810A (en) 1981-03-31 1981-03-31 Amplifying circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4795181A JPS57162810A (en) 1981-03-31 1981-03-31 Amplifying circuit

Publications (1)

Publication Number Publication Date
JPS57162810A true JPS57162810A (en) 1982-10-06

Family

ID=12789660

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4795181A Pending JPS57162810A (en) 1981-03-31 1981-03-31 Amplifying circuit

Country Status (1)

Country Link
JP (1) JPS57162810A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5723008B2 (en) * 1972-11-08 1982-05-17

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5723008B2 (en) * 1972-11-08 1982-05-17

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