JPS6410714A - Agc circuit - Google Patents
Agc circuitInfo
- Publication number
- JPS6410714A JPS6410714A JP16583987A JP16583987A JPS6410714A JP S6410714 A JPS6410714 A JP S6410714A JP 16583987 A JP16583987 A JP 16583987A JP 16583987 A JP16583987 A JP 16583987A JP S6410714 A JPS6410714 A JP S6410714A
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- power source
- resistance value
- agc
- 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
Landscapes
- Control Of Amplification And Gain Control (AREA)
Abstract
PURPOSE:To prevent the variation of a characteristic even if a power source voltage is changed by constituting a potential division circuit of four resistors and a constant current transistor (TR), and in addition, setting the value of the resistor at the prescribed value. CONSTITUTION:The potential division circuit 41 is constituted of the resistor (resistance value R4)2 connected from the power source to in AGC threshold voltage terminal 1, the resistor (resistance value R3)5 connected between the emitter of the TR 4 and the earth, the resistor (resistance value R1)6 connected between the base of the TR 4 and the power source, the resistor (resistance value R2)8 connected between the base of the TR 4 and the earth, and the TR 4. Then, circuit constants are determined so as to satisfy the condition of R3(R1+R2)=R4.R2. Thus, even if the power source voltage is changed, the threshold voltage of an AGC circuit is kept constant, and a characteristic change such as the change of an AGC control range can be removed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16583987A JPS6410714A (en) | 1987-07-02 | 1987-07-02 | Agc circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16583987A JPS6410714A (en) | 1987-07-02 | 1987-07-02 | Agc circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6410714A true JPS6410714A (en) | 1989-01-13 |
Family
ID=15819979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16583987A Pending JPS6410714A (en) | 1987-07-02 | 1987-07-02 | Agc circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6410714A (en) |
-
1987
- 1987-07-02 JP JP16583987A patent/JPS6410714A/en active Pending
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