JPS5593383A - Processing circuit for television signal - Google Patents
Processing circuit for television signalInfo
- Publication number
- JPS5593383A JPS5593383A JP205579A JP205579A JPS5593383A JP S5593383 A JPS5593383 A JP S5593383A JP 205579 A JP205579 A JP 205579A JP 205579 A JP205579 A JP 205579A JP S5593383 A JPS5593383 A JP S5593383A
- Authority
- JP
- Japan
- Prior art keywords
- potential
- interlocking
- collector current
- video
- 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.)
- Granted
Links
Abstract
PURPOSE: To avoid the change in DC potential at the video output signal and the video signal component at the color interlocking output signal, by providing two differential amplifiers, in the circuit electrically interlocking the contrast adjustment and color saturation adjustment.
CONSTITUTION: With the circuit interlocking the contrast adjustment and color saturation adjustment, the first differential amplifier 1 consisting of transistors Tr1a, 1b and the second differential amplifier 21 consisting of Tr21a, 21b and resistors 22, 23, 24 are provided. Further, the video signal from the input terminal 11 is fed to the amplifier 1 via Tr1c to be introduced to the video signal output terminal 26. In this case, the values of the resistors 4, 6, 23, 24 are selected so that the collector current can be equal to Tr1c and 21c, and the sum of the collector current of Tr1a and 21a is made equal to the collector current of Tr21C. Thus, the current flowing to the resistor 5 is always kept constant. Accordingly, the output potential of the output terminal 26 is kept constant even if the DC potential fed to the terminal 12 to control the amplitude of the video output signal is changed.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP205579A JPS5593383A (en) | 1979-01-10 | 1979-01-10 | Processing circuit for television signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP205579A JPS5593383A (en) | 1979-01-10 | 1979-01-10 | Processing circuit for television signal |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5593383A true JPS5593383A (en) | 1980-07-15 |
JPS6410155B2 JPS6410155B2 (en) | 1989-02-21 |
Family
ID=11518642
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP205579A Granted JPS5593383A (en) | 1979-01-10 | 1979-01-10 | Processing circuit for television signal |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5593383A (en) |
-
1979
- 1979-01-10 JP JP205579A patent/JPS5593383A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6410155B2 (en) | 1989-02-21 |
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