JPS57185708A - Amplifying circuit - Google Patents
Amplifying circuitInfo
- Publication number
- JPS57185708A JPS57185708A JP56069451A JP6945181A JPS57185708A JP S57185708 A JPS57185708 A JP S57185708A JP 56069451 A JP56069451 A JP 56069451A JP 6945181 A JP6945181 A JP 6945181A JP S57185708 A JPS57185708 A JP S57185708A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- outputted
- capacitor
- signal
- noninverting
- 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
- Manipulation Of Pulses (AREA)
- Amplifiers (AREA)
Abstract
PURPOSE: To make noise rejection for increased S/N, by amplifying only the vicinity of the peak level of an input signal, through a negative feedback noninverting amplification of a differential amplifying circuit.
CONSTITUTION: An input signal A is noninverting-amplified at a circuit 10. When a positive peak signal is outputted from the circuit 10, a transistor (TR)Q turns on at the peak level Vp and a capacitor C2 is instantly charged. If an output from the circuit 10 is lowered, the base and emitter of the TRQ is reverse- biased and the TRQ turns off. The charge/discharge of the capacitor C2 is repetitively made in the period when the positive peak signal is outputted from the ciruit 10. The output signal of the circuit 10 is applied to a noninverting input terminal of a circuit 20 of the next stage and the terminal voltage of the capacitor C2 is applied to the inverting input terminal. As a result, the output signals at prescribed level or over from the circuit 10 can be outputted from the circuit 20.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56069451A JPS57185708A (en) | 1981-05-11 | 1981-05-11 | Amplifying circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56069451A JPS57185708A (en) | 1981-05-11 | 1981-05-11 | Amplifying circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57185708A true JPS57185708A (en) | 1982-11-16 |
Family
ID=13403012
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56069451A Pending JPS57185708A (en) | 1981-05-11 | 1981-05-11 | Amplifying circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57185708A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH037418A (en) * | 1989-06-05 | 1991-01-14 | Matsushita Electric Ind Co Ltd | Negative feedback differential amplifier circuit |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5494263A (en) * | 1978-01-10 | 1979-07-25 | Meidensha Electric Mfg Co Ltd | Wave shaping circuit |
-
1981
- 1981-05-11 JP JP56069451A patent/JPS57185708A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5494263A (en) * | 1978-01-10 | 1979-07-25 | Meidensha Electric Mfg Co Ltd | Wave shaping circuit |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH037418A (en) * | 1989-06-05 | 1991-01-14 | Matsushita Electric Ind Co Ltd | Negative feedback differential amplifier circuit |
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