JPS54140823A - Color signal processing circuit of pal-system color receiver - Google Patents

Color signal processing circuit of pal-system color receiver

Info

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
Application number
JP4852678A
Other languages
Japanese (ja)
Other versions
JPS6129199B2 (en
Inventor
Tsuguji Tateuchi
Tomomitsu Azeyanagi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP4852678A priority Critical patent/JPS54140823A/en
Publication of JPS54140823A publication Critical patent/JPS54140823A/en
Publication of JPS6129199B2 publication Critical patent/JPS6129199B2/ja
Granted legal-status Critical Current

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
JP4852678A 1978-04-24 1978-04-24 Color signal processing circuit of pal-system color receiver Granted JPS54140823A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01130706U (en) * 1988-03-01 1989-09-05

Also Published As

Publication number Publication date
JPS6129199B2 (en) 1986-07-04

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