JPS54140823A - Color signal processing circuit of pal-system color receiver - Google Patents
Color signal processing circuit of pal-system color receiverInfo
- Publication number
- JPS54140823A JPS54140823A JP4852678A JP4852678A JPS54140823A JP S54140823 A JPS54140823 A JP S54140823A JP 4852678 A JP4852678 A JP 4852678A JP 4852678 A JP4852678 A JP 4852678A JP S54140823 A JPS54140823 A JP S54140823A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- color
- signal
- output
- demodulation
- 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
Landscapes
- Processing Of Color Television Signals (AREA)
Abstract
PURPOSE: To simplify a processing circuit and to reduce its cost by obtaining the demodulation output of a normal color difference signal only by switching a change-over switch circuit.
CONSTITUTION: A composite video signal from input terminal 14 has its chrominance signal component amplified by band amplifier 1 and some of output A is applied to switch circuit 4 via delay line 3 while the remainder is applied directly. At every horizontal synchronization, circuit 4 is changed over by FF circuit 10 to input its output signals C1 and C2 to adder 5 and subtracter 6, where signals D and E are obtained by adding and subtracting and supplied to color demodulation circuits 7 and 8 respectively. Further, output C1 is applied to burst gate circuit 20 to extract burst signal B, which is supplied to originating circuit 19, where a reference chrominance subcarrier, a local oscillation subcarrier for color-difference-signal demodulation, in phase with this burst signal and another chrominance subcarrier with its phase inverted are obtained and inputted to the color demodulation circuits.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4852678A JPS54140823A (en) | 1978-04-24 | 1978-04-24 | Color signal processing circuit of pal-system color receiver |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4852678A JPS54140823A (en) | 1978-04-24 | 1978-04-24 | Color signal processing circuit of pal-system color receiver |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54140823A true JPS54140823A (en) | 1979-11-01 |
JPS6129199B2 JPS6129199B2 (en) | 1986-07-04 |
Family
ID=12805798
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4852678A Granted JPS54140823A (en) | 1978-04-24 | 1978-04-24 | Color signal processing circuit of pal-system color receiver |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54140823A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01130706U (en) * | 1988-03-01 | 1989-09-05 |
-
1978
- 1978-04-24 JP JP4852678A patent/JPS54140823A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6129199B2 (en) | 1986-07-04 |
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