JPS57127311A - Direct current gain controller - Google Patents

Direct current gain controller

Info

Publication number
JPS57127311A
JPS57127311A JP1344881A JP1344881A JPS57127311A JP S57127311 A JPS57127311 A JP S57127311A JP 1344881 A JP1344881 A JP 1344881A JP 1344881 A JP1344881 A JP 1344881A JP S57127311 A JPS57127311 A JP S57127311A
Authority
JP
Japan
Prior art keywords
potential
resistances
output control
control characteristics
direct current
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
JP1344881A
Other languages
Japanese (ja)
Other versions
JPS6341445B2 (en
Inventor
Mitsuo Okawa
Hitoshi Sugano
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP1344881A priority Critical patent/JPS57127311A/en
Publication of JPS57127311A publication Critical patent/JPS57127311A/en
Publication of JPS6341445B2 publication Critical patent/JPS6341445B2/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
    • 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

Abstract

PURPOSE:To obtain the output control characteristics of an A-type or C-type volume, by using a B-type volume which is easy to produce. CONSTITUTION:The joint potential between resistances R1 and R2 is set at Va; the joint potential between resistances R2 and R3 is set at Vb; and the joint potential between resistances R3 and R4 is set at Vc respecrively. Then the potential of a mobile terminal 1 of a variable resistance R16 is varied from 0 through VCC. Thus a circuit part comprising transistors (TR)Q5-Q8, resistances R9 and R10 plus a constant current source I3 is actuated with the potential of the terminal 1 set about Vc to obtain the output control characteristics (C). A circuit part comprising TRs Q3, Q4, Q7 and Q8, resistances R7 and R8 plus a constant current source I2 is actuated at the potential of about Vb to obtain the output control characteristics (B). Furthermore a circuit part comprising TRs Q1, Q2, Q7 and Q8, resistances R5 and R6 plus a constant current source I1 is actuated at the potential of about Va to obtain the output control characteristics (A) respectively.
JP1344881A 1981-01-30 1981-01-30 Direct current gain controller Granted JPS57127311A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1344881A JPS57127311A (en) 1981-01-30 1981-01-30 Direct current gain controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1344881A JPS57127311A (en) 1981-01-30 1981-01-30 Direct current gain controller

Publications (2)

Publication Number Publication Date
JPS57127311A true JPS57127311A (en) 1982-08-07
JPS6341445B2 JPS6341445B2 (en) 1988-08-17

Family

ID=11833412

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1344881A Granted JPS57127311A (en) 1981-01-30 1981-01-30 Direct current gain controller

Country Status (1)

Country Link
JP (1) JPS57127311A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57208717A (en) * 1981-06-18 1982-12-21 Pioneer Electronic Corp Control circuit for voltage control variable attenuator
JPS58222607A (en) * 1982-06-21 1983-12-24 Nec Corp Gain control circuit
JPS63309010A (en) * 1987-06-11 1988-12-16 Rohm Co Ltd Electronic variable resistor circuit
JPH0246013A (en) * 1988-08-06 1990-02-15 Mitsubishi Electric Corp Gain variable amplifier circuit
US6300832B1 (en) 1999-02-09 2001-10-09 Nec Corporation Gain variable amplifier apparatus having improved gain control linearity characteristics
JP2007097005A (en) * 2005-09-30 2007-04-12 Hitachi Ltd Variable gain amplifier
US7514980B2 (en) 2005-06-23 2009-04-07 Samsung Electro-Mechanics Co., Ltd. Exponential function generator and variable gain amplifier using the same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1007046C2 (en) * 1997-09-16 1999-03-17 Skf Ind Trading & Dev Coated rolling bearing.
EP1482190B1 (en) * 2003-05-27 2012-12-05 Nissan Motor Company Limited Rolling element

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6228888A (en) * 1985-07-31 1987-02-06 Fuji Electric Co Ltd Method for discriminating object

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6228888A (en) * 1985-07-31 1987-02-06 Fuji Electric Co Ltd Method for discriminating object

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57208717A (en) * 1981-06-18 1982-12-21 Pioneer Electronic Corp Control circuit for voltage control variable attenuator
JPS58222607A (en) * 1982-06-21 1983-12-24 Nec Corp Gain control circuit
JPH0318364B2 (en) * 1982-06-21 1991-03-12 Nippon Electric Co
JPS63309010A (en) * 1987-06-11 1988-12-16 Rohm Co Ltd Electronic variable resistor circuit
JPH0666613B2 (en) * 1987-06-11 1994-08-24 ロ−ム株式会社 Electronic volume circuit
JPH0246013A (en) * 1988-08-06 1990-02-15 Mitsubishi Electric Corp Gain variable amplifier circuit
US6300832B1 (en) 1999-02-09 2001-10-09 Nec Corporation Gain variable amplifier apparatus having improved gain control linearity characteristics
US7514980B2 (en) 2005-06-23 2009-04-07 Samsung Electro-Mechanics Co., Ltd. Exponential function generator and variable gain amplifier using the same
JP2007097005A (en) * 2005-09-30 2007-04-12 Hitachi Ltd Variable gain amplifier

Also Published As

Publication number Publication date
JPS6341445B2 (en) 1988-08-17

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