JPS5696515A - Gain control circuit - Google Patents

Gain control circuit

Info

Publication number
JPS5696515A
JPS5696515A JP17252479A JP17252479A JPS5696515A JP S5696515 A JPS5696515 A JP S5696515A JP 17252479 A JP17252479 A JP 17252479A JP 17252479 A JP17252479 A JP 17252479A JP S5696515 A JPS5696515 A JP S5696515A
Authority
JP
Japan
Prior art keywords
current source
current
sets
changed
diode
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
JP17252479A
Other languages
Japanese (ja)
Other versions
JPS637481B2 (en
Inventor
Takafumi Okada
Hajime Nakajima
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 JP17252479A priority Critical patent/JPS5696515A/en
Publication of JPS5696515A publication Critical patent/JPS5696515A/en
Publication of JPS637481B2 publication Critical patent/JPS637481B2/ja
Granted 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

Abstract

PURPOSE:To obtain the characteristic with an arbitrary curve, by constituting the circuit with two rows of circuits consisting of a constant current source and (n) sets of diode series circuits and of two transistors respectively connected to the circuits. CONSTITUTION:A constant current source 13 is connected to the emitter of a transistor TRs 11 and 12. Further, a series circuit of a constant current source 14 and (n) sets of diodes 15 and a series circuit of a constant current source 16 and (n) sets of diodes 17 are provided in parallel between both ends of power supply Vcc, and the connecting points between the current source 14 and the diode 15 and that between the current source 16 and the diode 17 are respectively connected to the base of TRs 11 and 12. Further, the current of the current source 14 is changed. With such a circuit, the characteristics of the control current I3 and the output current I1 can freely be changed by changing the number (n). When the current I3 is changed in the range of (I3/I4)<n<1, the current I1 is proportional to the 3rd power of the current I3.
JP17252479A 1979-12-28 1979-12-28 Gain control circuit Granted JPS5696515A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17252479A JPS5696515A (en) 1979-12-28 1979-12-28 Gain control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17252479A JPS5696515A (en) 1979-12-28 1979-12-28 Gain control circuit

Publications (2)

Publication Number Publication Date
JPS5696515A true JPS5696515A (en) 1981-08-04
JPS637481B2 JPS637481B2 (en) 1988-02-17

Family

ID=15943526

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17252479A Granted JPS5696515A (en) 1979-12-28 1979-12-28 Gain control circuit

Country Status (1)

Country Link
JP (1) JPS5696515A (en)

Also Published As

Publication number Publication date
JPS637481B2 (en) 1988-02-17

Similar Documents

Publication Publication Date Title
JPS5659321A (en) Constant-current regulated power circuit
JPS564818A (en) Reference voltage circuit
JPS5696515A (en) Gain control circuit
JPS5232278A (en) Semiconductor device
FR2448274A1 (en) Supply circuit for semiconductor laser or LED - protects against overload using photocurrent to control series transistor
JPS5625831A (en) Logic circuit
JPS52154063A (en) Constant voltage power supply
JPS5744305A (en) Transistor circuit
JPS5689130A (en) Electronic circuit
JPS5792909A (en) Power amplifying circuit
JPS56745A (en) Transistor logic circuit
JPS55145438A (en) Transistor logic circuit
JPS5544286A (en) Logic circuit of current selection type
JPS579133A (en) Semiconductor logical circuit device
JPS567508A (en) Transistor circuit
JPS5671312A (en) Current miller circuit
JPS55164912A (en) Regulated power supply circuit
JPS561769A (en) Constant current circuit
JPS5358785A (en) Photo output stabilizer
JPS56132006A (en) Differential amplifier
JPS5489234A (en) Voltage generating circuit
JPS57190414A (en) Comparator
JPS5498558A (en) Level conversion circuit
JPS5558608A (en) Current miller output circuit
JPS567117A (en) Constant electric current circuit