JPS54114118A - Pre-amplifier for television pickup device - Google Patents
Pre-amplifier for television pickup deviceInfo
- Publication number
- JPS54114118A JPS54114118A JP2087778A JP2087778A JPS54114118A JP S54114118 A JPS54114118 A JP S54114118A JP 2087778 A JP2087778 A JP 2087778A JP 2087778 A JP2087778 A JP 2087778A JP S54114118 A JPS54114118 A JP S54114118A
- Authority
- JP
- Japan
- Prior art keywords
- amplifier
- reference voltage
- output
- output signal
- input terminal
- 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
Abstract
PURPOSE: To secure the level compression for the pulse of a large amplitude with the low power voltage and without using any clipping circuit by comparing the output signal level of the pre-amplifier with the preset reference voltage and increasing the negative feedback quantity of the amplifier when the output signal level exceeds the reference voltage.
CONSTITUTION: Resistance R4 and R5 connected in series which form the negative feedback loop are connected between output terminal 7 of amplifier 3 and the gate of FET2 functioning as the input terminal of the pre-amplifier, and then the 1st input terminal of comparison amplifier 8 is connected to the output terminal of amplifier 3. Reference voltage source 10 is connected to the other input terminal of amplifier 8, and the output side of amplifier 8 is connected to gate circuit 10. Thus, feedback resistance R4 of the feedback loop is by-passed by the output of circuit 10. When the output signal of the pre-amplifier exceeds the reference voltage, the feedback quantity of the feedback loop is controlled to compress the level of the output signal.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2087778A JPS54114118A (en) | 1978-02-27 | 1978-02-27 | Pre-amplifier for television pickup device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2087778A JPS54114118A (en) | 1978-02-27 | 1978-02-27 | Pre-amplifier for television pickup device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54114118A true JPS54114118A (en) | 1979-09-06 |
Family
ID=12039405
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2087778A Pending JPS54114118A (en) | 1978-02-27 | 1978-02-27 | Pre-amplifier for television pickup device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54114118A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5656217U (en) * | 1979-10-08 | 1981-05-15 |
-
1978
- 1978-02-27 JP JP2087778A patent/JPS54114118A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5656217U (en) * | 1979-10-08 | 1981-05-15 | ||
JPS628574Y2 (en) * | 1979-10-08 | 1987-02-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5545224A (en) | Filter circuit | |
JPS5363851A (en) | Push-pull pulse amplifier circuit | |
JPS5421102A (en) | Semiconductor device circuit | |
JPS51116647A (en) | Variable impedance circuit | |
JPS54114118A (en) | Pre-amplifier for television pickup device | |
JPS52112261A (en) | Power amplifier circuit | |
JPS57170607A (en) | Amplifying circuit | |
JPS5365645A (en) | Field effect transistor amplifier circuit | |
JPS5320555A (en) | Constant current circuit | |
JPS54161305A (en) | Ac amplifying device | |
JPS5527714A (en) | Duty cycle control circuit | |
JPS5447471A (en) | Electronic circuit | |
JPS54108513A (en) | Agc circuit of facsimile equipment | |
SU1136306A1 (en) | Device for automatic stabilization of power | |
JPS5320530A (en) | Inverter | |
JPS5753129A (en) | Active filter | |
JPS51136133A (en) | High frequency inverter | |
JPS5637806A (en) | Magnetic recording circuit device | |
JPS5711537A (en) | Logical circuit | |
JPS5726909A (en) | Distortion rejector | |
JPS56160111A (en) | Amplifier of pulse duration modulated signal | |
JPS5676638A (en) | Automatic output controlling system for am transmitter | |
JPS56117417A (en) | Fdnr circuit | |
JPS6432706A (en) | Frequency converting circuit | |
JPS55151840A (en) | Two-terminal signal generating circuit |