JPS6419812A - Gain adjusting circuit - Google Patents
Gain adjusting circuitInfo
- 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
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.
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)
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 |
-
1987
- 1987-07-15 JP JP17462687A patent/JPS6419812A/en active Pending
Cited By (8)
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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