KR950005055A - Color compensation circuit of composite video signal - Google Patents

Color compensation circuit of composite video signal Download PDF

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Publication number
KR950005055A
KR950005055A KR1019930014157A KR930014157A KR950005055A KR 950005055 A KR950005055 A KR 950005055A KR 1019930014157 A KR1019930014157 A KR 1019930014157A KR 930014157 A KR930014157 A KR 930014157A KR 950005055 A KR950005055 A KR 950005055A
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KR
South Korea
Prior art keywords
signal
time constant
video signal
capacitor
transistor
Prior art date
Application number
KR1019930014157A
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Korean (ko)
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KR960013553B1 (en
Inventor
노관형
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배순훈
대우전자 주식회사
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Priority to KR1019930014157A priority Critical patent/KR960013553B1/en
Publication of KR950005055A publication Critical patent/KR950005055A/en
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Publication of KR960013553B1 publication Critical patent/KR960013553B1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

본 발명은 RF 신호와 외부영상신호를 스위칭출력하는 컬러텔레비전에서 상대적으로 화질특성의 열화가 초래되는 단일의 캐패시터(C1)에 의해 APC 필터의 시정수를 보상하는 PLL 방식의 영상검파회로에 상기 RF 신호와 외부영상신호의 영상신호의 스위칭출력시 영상검파회로내의 APC 필터의 시정수를 자동보상하여 주는 시정수보상부(40)를 구비하여 RF 신호의 화질의 개선하는 것으로, 상기 시정수보상부(40)는 외부영상신호의 수신으로부터 RF신호로의 절환시에 입력되는 영상스위칭 제어신호가 인가되는 콘트롤단자(CT)에 베이스가 접속된 트랜지스터(Q1)와, 일단이 상기 캐패시터(C1)에 접속되고 다른단이 트랜지스터(Q1)의 컬렉터측에 접속된 캐패시터(C2)와 일단이 전원에 접속되고 다른단이 상기 캐패시터(C2)와 트랜지스터(Q1)의 컬렉터의 접속노드에 접속된 저항(R1)으로 이루어진 시정수소자를 갖추어 구성된 것이다.The present invention relates to a PLL image detection circuit for compensating the time constant of an APC filter by a single capacitor (C1) that causes deterioration of image quality characteristics in a color television for switching and outputting an RF signal and an external video signal. The time constant compensator is provided with a time constant compensator 40 for automatically compensating the time constant of the APC filter in the image detection circuit at the time of switching output between the signal and the external video signal. Reference numeral 40 is a transistor Q1 having a base connected to a control terminal CT to which an image switching control signal is input when switching from an external image signal to an RF signal, and one end of which is connected to the capacitor C1. A capacitor C2 connected at one end thereof to the collector side of the transistor Q1 and one end thereof are connected to a power supply, and the other end thereof is connected to a connection node of the collector of the capacitor C2 and the transistor Q1. It configured to cut-equipped constant hydrogen consisting of a resistor (R1).

Description

복합영상신호의 색상보상회로Color compensation circuit of composite video signal

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 일반적인 영상검파방식을 설명하는 블럭구성도.1 is a block diagram illustrating a general image detection method.

Claims (1)

RF 신호와 외부영상신호를 스위칭출력하는 컬러텔레비전에 채용되어 단일의 캐패시터(C1)에 의해 APC 필터의 시정수가 보상되는 PLL 방식의 영상검파회로에 있어서, 상기 RF 신호와 외부영상신호의 영상신호의 스위칭출력시 영상검파회로내의 APC 필터의 시정수를 자동보상하여 주는 시정수보상부(40)를 구비하여 구성되고, 상기 시정수보상부(40)는 외부영상신호로부터 RF신호로의 절환시에 입력되는 영상스위칭 제어신호가 인가되는 콘트롤단자(CT)에 베이스가 접속된 트랜지스터(Q1)와, 일단이 상기 캐패시터(C1)에 접속되고 다른단이 트랜지스터(Q1)의 컬렉터측에 접속된 캐패시터(C2)와 일단이 전원에 접속되고 다른단이 상기 캐패시터(C2)와 트랜지스터(Q1)의 컬렉터의 접속노드에 접속된 저항(R1)으로 이루어진 시정수소자를 갖추어 구성된 것을 특징으로 하는 복합영상신호의 색상보상회로.A PLL image detection circuit employing a color television for switching and outputting an RF signal and an external video signal to compensate for the time constant of an APC filter by a single capacitor C1, wherein the video signal of the RF signal and the external video signal And a time constant compensator 40 for automatically compensating the time constant of the APC filter in the image detection circuit at the time of switching output. The time constant compensator 40 is adapted to switch from an external video signal to an RF signal. A transistor Q1 having a base connected to a control terminal CT to which an input image switching control signal is applied, and a capacitor connected at one end thereof to the capacitor C1 and the other end connected to a collector side of the transistor Q1; C2) and one end are connected to a power supply, and the other end is provided with a time constant element made up of a resistor R1 connected to the connection node of the capacitor C2 and the collector of the transistor Q1. Is the color compensation circuit of the composite video signal. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930014157A 1993-07-26 1993-07-26 Circuit for compensating hue in a composite video signal KR960013553B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930014157A KR960013553B1 (en) 1993-07-26 1993-07-26 Circuit for compensating hue in a composite video signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930014157A KR960013553B1 (en) 1993-07-26 1993-07-26 Circuit for compensating hue in a composite video signal

Publications (2)

Publication Number Publication Date
KR950005055A true KR950005055A (en) 1995-02-18
KR960013553B1 KR960013553B1 (en) 1996-10-07

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ID=19360003

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019930014157A KR960013553B1 (en) 1993-07-26 1993-07-26 Circuit for compensating hue in a composite video signal

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KR (1) KR960013553B1 (en)

Also Published As

Publication number Publication date
KR960013553B1 (en) 1996-10-07

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