JPS5547714A - Variable gain amplifying circuit - Google Patents
Variable gain amplifying circuitInfo
- Publication number
- JPS5547714A JPS5547714A JP12079478A JP12079478A JPS5547714A JP S5547714 A JPS5547714 A JP S5547714A JP 12079478 A JP12079478 A JP 12079478A JP 12079478 A JP12079478 A JP 12079478A JP S5547714 A JPS5547714 A JP S5547714A
- Authority
- JP
- Japan
- Prior art keywords
- current
- transistor
- collector current
- collector
- amplifying circuit
- 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
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 increase the signal to noise ratio and the distortion characteristics, by picking up output from the load side of the differential amplifier in common use for current division circuit via the current Miller circuit. CONSTITUTION:The input signal is current-amplified with the transistors 22 and 23 so that opposite phase can be obtained each other. The current amplified is divided with the ratio determined with the variable voltage 31 by the current division circuits 32a and 32b. The collector current of transistor 28 and that of transistor 29 are opposite in phase and equal for the amplitude, and the collector current of the transistor 28 is the collector current of the transistor 34 with the current Miller circuit 37 and nearly equal to the collector current of the transistor 35. The sum of the current of the collector current of transistor 35 and that of transistor 29 flows to the output terminal 36.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12079478A JPS5547714A (en) | 1978-09-30 | 1978-09-30 | Variable gain amplifying circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12079478A JPS5547714A (en) | 1978-09-30 | 1978-09-30 | Variable gain amplifying circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5547714A true JPS5547714A (en) | 1980-04-04 |
Family
ID=14795153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12079478A Pending JPS5547714A (en) | 1978-09-30 | 1978-09-30 | Variable gain amplifying circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5547714A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57125509A (en) * | 1981-01-28 | 1982-08-04 | Toshiba Corp | Signal level control circuit |
| JPS5824208A (en) * | 1981-08-03 | 1983-02-14 | Victor Co Of Japan Ltd | Attenuator circuit |
| US4464632A (en) * | 1980-07-08 | 1984-08-07 | Tokyo Shibaura Denki Kabushiki Kaisha | Volume control circuit |
| JPS60177711A (en) * | 1984-02-10 | 1985-09-11 | プレシジヨン・モノリシツクス・インコ−ポレ−テツド | Digital control amplifier |
-
1978
- 1978-09-30 JP JP12079478A patent/JPS5547714A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4464632A (en) * | 1980-07-08 | 1984-08-07 | Tokyo Shibaura Denki Kabushiki Kaisha | Volume control circuit |
| JPS57125509A (en) * | 1981-01-28 | 1982-08-04 | Toshiba Corp | Signal level control circuit |
| JPS6341446B2 (en) * | 1981-01-28 | 1988-08-17 | Tokyo Shibaura Electric Co | |
| JPS5824208A (en) * | 1981-08-03 | 1983-02-14 | Victor Co Of Japan Ltd | Attenuator circuit |
| JPS60177711A (en) * | 1984-02-10 | 1985-09-11 | プレシジヨン・モノリシツクス・インコ−ポレ−テツド | Digital control amplifier |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1479008A (en) | Amplifier circuit | |
| ES402652A1 (en) | Amplifier circuit | |
| ES426653A1 (en) | Complementary field effect transistor differential amplifier | |
| IE811201L (en) | Amplifier | |
| GB1286602A (en) | Improvements in or relating to differential amplifiers | |
| JPS6472605A (en) | Feedback amplifier | |
| ES418979A1 (en) | Switching circuit | |
| JPS5547714A (en) | Variable gain amplifying circuit | |
| ES8200801A1 (en) | Variable-gain differential amplifier | |
| JPS5478956A (en) | Amplified output circuit | |
| SU746568A1 (en) | Operational amplifier | |
| JPS5599812A (en) | Broad band balanced amplifier having gain selection function | |
| SU371664A1 (en) | DIFFERENTIAL AMPLIFIER | |
| SU416821A1 (en) | ||
| SU420089A1 (en) | DIFFERENTIAL AMPLIFIER | |
| SU580558A1 (en) | Analogue multiplier | |
| JPS55115708A (en) | Push pull amplifier | |
| SU469975A1 (en) | Operational amplifier | |
| SU381152A1 (en) | ||
| JPS5696514A (en) | Amplifying circuit with variable gain | |
| JPS5675712A (en) | Power amplifier | |
| GB843366A (en) | Improvements in and relating to transistor amplifiers | |
| JPH0821820B2 (en) | Balance conversion circuit | |
| JPS56116309A (en) | Field effect transistor amplifier | |
| JPS55121715A (en) | Feedback amplifier |