JPS59143176U

JPS59143176U - color television receiver

Info

Publication number: JPS59143176U
Application number: JP3773583U
Authority: JP
Inventors: 岡本　敏一
Original assignee: 三洋電機株式会社
Priority date: 1983-03-15
Filing date: 1983-03-15
Publication date: 1984-09-25
Also published as: JPS635329Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は従来のカラーテレビジョン受像機の色復調回路
の一例を示す概略図、笹２図は本考案のカラーテレビジ
ョン受像機の色復調回路の一例を示す概略図である。１・・・第１回路（第１ｔｃ）、５・・・第２回路（第
２ＩＣ）、Ｄ２・・・第１スイツチングダイオード、Ｄ
６・・・第２スイツチングダイオード、１１・・・ＩＨ
遅延線、１２・・・加減算回路（トランス）、１２ａ・
・・１次コイル、１２ｂ・・・２次コイル、１．・・・
ダイレクト信号路。FIG. 1 is a schematic diagram showing an example of a color demodulation circuit of a conventional color television receiver, and FIG. 2 is a schematic diagram showing an example of a color demodulation circuit of a color television receiver of the present invention. DESCRIPTION OF SYMBOLS 1...1st circuit (1st TC), 5...2nd circuit (2nd IC), D2...1st switching diode, D
6...Second switching diode, 11...IH
Delay line, 12...addition/subtraction circuit (transformer), 12a.
...Primary coil, 12b...Secondary coil, 1. ...
Direct signal path.

Claims

[Scope of utility model registration request]

(1) In a color television receiver that can receive PAL signals, SECAM signals, and NTSC signals, the input side of the IH delay line connects a first switching diode to the first circuit that outputs PAL chrominance signals and NTSC chrominance signals. and a second circuit that outputs the SECAM chrominance signal via a second switching diode, and the output side of the IH delay line is connected to an adder/subtractor circuit, and the first switching diode and the second The connection point with the first circuit is also connected to the addition/subtraction circuit via a direct signal path, and when a PAL signal is received, the first switching diode is turned on and the second switching diode is turned off, and the signal is output from the first circuit. supplying an IH-delayed chrominance signal to the adder/subtractor circuit via the first switching diode and the IH delay line, and supplying a non-delayed chrominance signal to the adder/subtractor circuit via the direct signal path; The R-Y and B-Y chrominance signals are taken out from the addition/subtraction circuit, and when an NTSC signal is received, the first switching diode is turned off, and the chrominance signal output from the first circuit is subjected to the addition/subtraction via the direct signal path. The chrominance signal is supplied to the circuit, and the chrominance signal is extracted as it is without addition or subtraction from the addition/subtraction circuit.
When receiving the SECAM signal, the first switching diode is turned off and the second switching diode is turned on.
, the chrominance signal output from the second circuit is passed through the second switching diode to the I
A color television receiver characterized in that a chrominance signal is supplied to an IH delay line and an IH-delayed chrominance signal is extracted from the IH delay line.

(2) The adding/subtracting circuit includes a transformer whose primary coil is connected to the output side of the IH delay line, the middle point of the secondary coil is connected to the direct signal path, and the chrominance is A color television receiver according to claim 1, which is configured to output a signal.