JPS5461825A - Color video signal processing circuit - Google Patents
Color video signal processing circuitInfo
- Publication number
- JPS5461825A JPS5461825A JP12839877A JP12839877A JPS5461825A JP S5461825 A JPS5461825 A JP S5461825A JP 12839877 A JP12839877 A JP 12839877A JP 12839877 A JP12839877 A JP 12839877A JP S5461825 A JPS5461825 A JP S5461825A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- color signal
- signals
- signal processing
- video signal
- 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
- Processing Of Color Television Signals (AREA)
Abstract
PURPOSE: To obtain tolerance of the number of pins by controlling the cutting off of signals, by mixing and applying a color signal and DC control signal to either differential amplifier.
CONSTITUTION: To the base of transistor Tr3 of either one of differential amplifiers 3 and 4, a mixed signal of a color signal and DC control signal is supplied, and a constant potential voltage is to the input of the other Tr4; and this DC control signal when containing a color signal has a fixed voltage and when no color signal has a voltage below a fixed voltage, and constant-potential signals are extracted from differential amplifiers 35 and 36 regardless of the existence of the color signal. Then, a signal relating to signals of differential amplifiers 3 and 4 is supplied to the base of the Tr35 of either differential amplifier 3 or 4, and a constant potential is to the base of the other Tr36, so that amplifiers 35 and 36 will output signals with a constant potential constantly.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12839877A JPS5461825A (en) | 1977-10-26 | 1977-10-26 | Color video signal processing circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12839877A JPS5461825A (en) | 1977-10-26 | 1977-10-26 | Color video signal processing circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5461825A true JPS5461825A (en) | 1979-05-18 |
Family
ID=14983806
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12839877A Pending JPS5461825A (en) | 1977-10-26 | 1977-10-26 | Color video signal processing circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5461825A (en) |
-
1977
- 1977-10-26 JP JP12839877A patent/JPS5461825A/en active Pending
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