JPS5478059A - Gain control circuit - Google Patents
Gain control circuitInfo
- Publication number
- JPS5478059A JPS5478059A JP14495777A JP14495777A JPS5478059A JP S5478059 A JPS5478059 A JP S5478059A JP 14495777 A JP14495777 A JP 14495777A JP 14495777 A JP14495777 A JP 14495777A JP S5478059 A JPS5478059 A JP S5478059A
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- signals
- agc
- intermediate frequency
- resistance
- 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 cause a circuit to perform a sufficient AGC operation without making an AGC operation range narrower even for a large input by constituting the circuit so that AGC signals and manual gain regulating control signals may be applied to separate amplifier elements.
CONSTITUTION: Intermediate frequency input signals from terminal 1 are applied to intermediate frequency amplifier 16 through variable gain controlling transistor 6, and amplified signals are applied to AM detecting diode 22 through intermediate frequency transistor 27. Next, demodulated low frequency output signals are generated at terminal 25 and are taken out from the low pass filter consisting of resistance 19 and capacitor 18 and are applied to the base of transistor 6 through resistance 3, thereby operating AGC. In this constitution, emitters of the second and the third transistors 9 and 12 are connected to the collector of transistor 6, and further, the collector of one transistor 12 is provided with load resistance 13 to take out the output, and the base voltage of transistor 12 is changed by gain regulating variable resistor 15.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14495777A JPS5478059A (en) | 1977-12-05 | 1977-12-05 | Gain control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14495777A JPS5478059A (en) | 1977-12-05 | 1977-12-05 | Gain control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5478059A true JPS5478059A (en) | 1979-06-21 |
Family
ID=15374117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14495777A Pending JPS5478059A (en) | 1977-12-05 | 1977-12-05 | Gain control circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5478059A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105353213A (en) * | 2015-12-15 | 2016-02-24 | 中国电子科技集团公司第四十一研究所 | Waveform integral gain distribution method for spectrum analyzer |
-
1977
- 1977-12-05 JP JP14495777A patent/JPS5478059A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105353213A (en) * | 2015-12-15 | 2016-02-24 | 中国电子科技集团公司第四十一研究所 | Waveform integral gain distribution method for spectrum analyzer |
| CN105353213B (en) * | 2015-12-15 | 2018-02-06 | 中国电子科技集团公司第四十一研究所 | A kind of wave complete machine gain distribution method of spectrum analyzer |
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