JPS56110316A - Fixed gain switching circuit - Google Patents
Fixed gain switching circuitInfo
- Publication number
- JPS56110316A JPS56110316A JP1261080A JP1261080A JPS56110316A JP S56110316 A JPS56110316 A JP S56110316A JP 1261080 A JP1261080 A JP 1261080A JP 1261080 A JP1261080 A JP 1261080A JP S56110316 A JPS56110316 A JP S56110316A
- Authority
- JP
- Japan
- Prior art keywords
- pilot signal
- circuit
- fixed gain
- switching circuit
- oscillator
- 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
- 230000005540 biological transmission Effects 0.000 abstract 2
- 238000001514 detection method Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/005—Control by a pilot signal
Landscapes
- Control Of Amplification And Gain Control (AREA)
Abstract
PURPOSE:To increase the reliability for a switch of the fixed gain, by switching the pilot signal contained in the transmission signal before it is converted into a DC. CONSTITUTION:Only the pilot signal is extracted out of the transmission signal applied to the terminal 1 through the BPF3, and the pilot signal is detected through the level detection circuit 8 via the amplifying circuit 4 and the rectifying circuit 5. When the circuit 8 detects the pilot signal lower than the reference level, the switch 10 is switched to the oscillator 11 in the own station. Then the pilot signal of the reference level of the oscillator 11 is applied to an automatic gain control circuit via the expanding circuit 7 to fix the output level. Thus the switching is facilitated with a reduced quantity of power consumption since the pilot signal is switched before it is converted into a DC.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1261080A JPS56110316A (en) | 1980-02-05 | 1980-02-05 | Fixed gain switching circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1261080A JPS56110316A (en) | 1980-02-05 | 1980-02-05 | Fixed gain switching circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56110316A true JPS56110316A (en) | 1981-09-01 |
Family
ID=11810126
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1261080A Pending JPS56110316A (en) | 1980-02-05 | 1980-02-05 | Fixed gain switching circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56110316A (en) |
-
1980
- 1980-02-05 JP JP1261080A patent/JPS56110316A/en active Pending
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