JPS57107619A - Low-frequency amplifying circuit - Google Patents
Low-frequency amplifying circuitInfo
- Publication number
- JPS57107619A JPS57107619A JP55184392A JP18439280A JPS57107619A JP S57107619 A JPS57107619 A JP S57107619A JP 55184392 A JP55184392 A JP 55184392A JP 18439280 A JP18439280 A JP 18439280A JP S57107619 A JPS57107619 A JP S57107619A
- Authority
- JP
- Japan
- Prior art keywords
- current
- trs
- voltage
- bias voltage
- bias
- 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
Links
- 230000003247 decreasing effect Effects 0.000 abstract 1
Landscapes
- Amplifiers (AREA)
Abstract
PURPOSE: To reduce a crossover distortion, by changing a current source of a bias circuit according to a bias voltage.
CONSTITUTION: A bias voltage for transistors (TRs) 3, 4 of an output stage is converted into a current in response to the bias voltage with transistors (TRs) 10, 26 and 11, 32 constituting a current mirror circuit. This current is smoothed and converted into a DC voltage, which controls current source TRs 9, 20 of a bias circuit 41 through a variable current source circuit 43 and a voltage between terminals of resistors 12, 13, allowing to change the operating point of the output stage TRs 3, 4. In this case, the current is determined so that the crossover distortion can not be generated with a resistor 17. Although a variable current I1 is reduced when the bias voltage is decreased, the current is kept constant which generates no minimized crossover distortion.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55184392A JPS57107619A (en) | 1980-12-25 | 1980-12-25 | Low-frequency amplifying circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55184392A JPS57107619A (en) | 1980-12-25 | 1980-12-25 | Low-frequency amplifying circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57107619A true JPS57107619A (en) | 1982-07-05 |
| JPH0252882B2 JPH0252882B2 (en) | 1990-11-15 |
Family
ID=16152370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55184392A Granted JPS57107619A (en) | 1980-12-25 | 1980-12-25 | Low-frequency amplifying circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57107619A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4706045B2 (en) * | 2008-03-12 | 2011-06-22 | テクトロニクス・インターナショナル・セールス・ゲーエムベーハー | Class A amplifier circuit |
-
1980
- 1980-12-25 JP JP55184392A patent/JPS57107619A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0252882B2 (en) | 1990-11-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS51122745A (en) | Dc constant-voltage power source circuit | |
| JPS5718109A (en) | Sound volume controlling circuit | |
| JPS5728410A (en) | Voltage controlled type variable gain circuit | |
| JPS6473168A (en) | Ignition control circuit | |
| JPS57107619A (en) | Low-frequency amplifying circuit | |
| JPS56132172A (en) | Rectification circuit | |
| JPS5717207A (en) | Amplifying circuit | |
| JPS57133707A (en) | Bias circuit for power amplifier | |
| ATE50672T1 (en) | CIRCUIT ARRANGEMENT FOR VOLUME ADJUSTMENT. | |
| JPS536553A (en) | Variable gain amplifier | |
| JPS57208708A (en) | Amplifying circuit having dc feedback | |
| JPS5750115A (en) | Gain control circuit | |
| JPS57199396A (en) | Speaker input controlling circuit | |
| JPS5474601A (en) | Hysteresis circuit of current control | |
| JPS56131210A (en) | Power amplifying circuit | |
| JPS55153108A (en) | Integrated circuit for video head amplifier | |
| JPS56110307A (en) | Electric power amplifier | |
| JPS57208713A (en) | Bias controlling circuit | |
| JPS5671119A (en) | Control circuit | |
| JPS56156005A (en) | Electric power amplifier | |
| JPS555559A (en) | Integrated circuit | |
| JPS5797227A (en) | Electronic switching amplifying circuit | |
| JPS56111375A (en) | Picture signal amplifying circuit | |
| JPS5375746A (en) | Variable gain conrrol circuit | |
| JPS5753115A (en) | Differential amplifying circuit |