JPS5745708A - Amplifying circuit - Google Patents
Amplifying circuitInfo
- Publication number
- JPS5745708A JPS5745708A JP55121129A JP12112980A JPS5745708A JP S5745708 A JPS5745708 A JP S5745708A JP 55121129 A JP55121129 A JP 55121129A JP 12112980 A JP12112980 A JP 12112980A JP S5745708 A JPS5745708 A JP S5745708A
- Authority
- JP
- Japan
- Prior art keywords
- gain
- high frequency
- feedback
- circuit
- frequency
- 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
- H03G5/00—Tone control or bandwidth control in amplifiers
- H03G5/16—Automatic control
Landscapes
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
Abstract
PURPOSE:To change a high frequency cut-off frequency in transmission characteristics to a main signal of this circuit system, by negative-feeding back only the high frequency component and changing the closed gain with the gain change of the variable gain amplifying circuit. CONSTITUTION:A main signal to be amplified is applied to an input terminal 2, and the output is fed back to a feedback circuit 5. Since the feedback circuit 5 consists of a polarity inversion amplifier 51 and a high-pass circuit 52, the feedback is a negative feedback, and the amount of feedback is less at a low frequency and much in high frequency. Thus, the frequency characteristics from the input terminal 2 to an output terminal 3 are of high frequency decrease type, and when the gain of a variable gain amplifier 1 is increased, the closed loop gain of the feedback loop is increased, the high frequency drooping characteristics are emphasized, and when the gain of the amplifier 1 is decreased, the high frequency drooping characteristics are weakened.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55121129A JPS5745708A (en) | 1980-09-03 | 1980-09-03 | Amplifying circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55121129A JPS5745708A (en) | 1980-09-03 | 1980-09-03 | Amplifying circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5745708A true JPS5745708A (en) | 1982-03-15 |
Family
ID=14803588
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55121129A Pending JPS5745708A (en) | 1980-09-03 | 1980-09-03 | Amplifying circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5745708A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60258918A (en) * | 1985-03-20 | 1985-12-20 | Toshiba Ceramics Co Ltd | Manufacture of sic-si heat equalizing tube for manufacturing gas impermeable semiconductor |
-
1980
- 1980-09-03 JP JP55121129A patent/JPS5745708A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60258918A (en) * | 1985-03-20 | 1985-12-20 | Toshiba Ceramics Co Ltd | Manufacture of sic-si heat equalizing tube for manufacturing gas impermeable semiconductor |
JPS6220687B2 (en) * | 1985-03-20 | 1987-05-08 | Toshiba Ceramics Co |
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