JPS6419812A - Gain adjusting circuit - Google Patents

Gain adjusting circuit

Info

Publication number
JPS6419812A
JPS6419812A JP17462687A JP17462687A JPS6419812A JP S6419812 A JPS6419812 A JP S6419812A JP 17462687 A JP17462687 A JP 17462687A JP 17462687 A JP17462687 A JP 17462687A JP S6419812 A JPS6419812 A JP S6419812A
Authority
JP
Japan
Prior art keywords
turned
circuit
gain
time
operating amplifier
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
JP17462687A
Other languages
Japanese (ja)
Inventor
Takayuki Suzuki
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP17462687A priority Critical patent/JPS6419812A/en
Publication of JPS6419812A publication Critical patent/JPS6419812A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE:To reduce an occupied area at the time of realizing a compact circuit scale and a semiconductor integrated circuit by using a control switch circuit and sharing a pair of operating amplifier and a resistance rudder circuit for a gain adjustment in case of more than 1 a gain adjustment in case of below 1. CONSTITUTION:At the time of adjusting the gain in a range below 1, analog switches SW0 and SW02 are turned on and an analog switch SW01 is turned off. Accordingly, since resistances R0-Rn are not included in a negative feedback path, the operating amplifier AMP is a simple voltage follower. At the time of adjusting the gain in the range above 1, the analog switches SW0 and SW02 are turned off and the analog switch SW01 is turned on. Accordingly, the resistance elements R0-Rn are included in the negative feedback path and the operating amplifier AMP is a non-inversion amplifying circuit.
JP17462687A 1987-07-15 1987-07-15 Gain adjusting circuit Pending JPS6419812A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17462687A JPS6419812A (en) 1987-07-15 1987-07-15 Gain adjusting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17462687A JPS6419812A (en) 1987-07-15 1987-07-15 Gain adjusting circuit

Publications (1)

Publication Number Publication Date
JPS6419812A true JPS6419812A (en) 1989-01-23

Family

ID=15981882

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17462687A Pending JPS6419812A (en) 1987-07-15 1987-07-15 Gain adjusting circuit

Country Status (1)

Country Link
JP (1) JPS6419812A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001203549A (en) * 2000-01-20 2001-07-27 Onkyo Corp Amplifier circuit
JP2002271155A (en) * 2001-03-13 2002-09-20 Sony Corp Audio amplifier
US6798264B2 (en) * 2002-08-08 2004-09-28 Micron Technology, Inc. Methods and apparatus for signal processing
JP2007258784A (en) * 2006-03-20 2007-10-04 New Japan Radio Co Ltd Gain variable amplifier
JP2010278489A (en) * 2009-05-26 2010-12-09 Mitsutoyo Corp Non-inverting amplifier circuit and measuring machine
FR3012273A1 (en) * 2013-10-22 2015-04-24 St Microelectronics Sa
JP2016082504A (en) * 2014-10-21 2016-05-16 ローム株式会社 Variable gain amplifier circuit

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001203549A (en) * 2000-01-20 2001-07-27 Onkyo Corp Amplifier circuit
JP2002271155A (en) * 2001-03-13 2002-09-20 Sony Corp Audio amplifier
US6798264B2 (en) * 2002-08-08 2004-09-28 Micron Technology, Inc. Methods and apparatus for signal processing
JP2007258784A (en) * 2006-03-20 2007-10-04 New Japan Radio Co Ltd Gain variable amplifier
JP2010278489A (en) * 2009-05-26 2010-12-09 Mitsutoyo Corp Non-inverting amplifier circuit and measuring machine
FR3012273A1 (en) * 2013-10-22 2015-04-24 St Microelectronics Sa
US9473097B2 (en) 2013-10-22 2016-10-18 Stmicroelectronics Sa Resistive ladder
JP2016082504A (en) * 2014-10-21 2016-05-16 ローム株式会社 Variable gain amplifier circuit

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