JPS5494227A - Video mixing amplifier - Google Patents

Video mixing amplifier

Info

Publication number
JPS5494227A
JPS5494227A JP80978A JP80978A JPS5494227A JP S5494227 A JPS5494227 A JP S5494227A JP 80978 A JP80978 A JP 80978A JP 80978 A JP80978 A JP 80978A JP S5494227 A JPS5494227 A JP S5494227A
Authority
JP
Japan
Prior art keywords
signal
composite video
circuit
video signal
burst signal
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.)
Pending
Application number
JP80978A
Other languages
Japanese (ja)
Inventor
Taichi Yanagawa
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 Denshi KK
Original Assignee
Hitachi Denshi KK
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 Denshi KK filed Critical Hitachi Denshi KK
Priority to JP80978A priority Critical patent/JPS5494227A/en
Publication of JPS5494227A publication Critical patent/JPS5494227A/en
Pending legal-status Critical Current

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Landscapes

  • Processing Of Color Television Signals (AREA)

Abstract

PURPOSE: To prevent the occurrence of color shift by eliminating the phase difference between the burst signal and the chroma signal, by mixing process without the rejection of burst signal in the composite video signal.
CONSTITUTION: Composite video signals VBS1 and VBS2 are given to the inputs 1 and 2 and only the synchronizing signal is eliminated with the rejection circuits SE1 and SE2, then the synthesis of the video signal VB1 and VB2 is made with the mixing circuit MIX. Corresponding to the presence period t of the burst signal B at the composite video signal VBS, the control pulse Pc is given to the mixing circuit MIX and the gate G from the pulse generating circuit PG. In the gain control circuit GC, only the burst signal B is subject to the amplitude control, the synchronizing signal is added with the additional circuit SA, and it is delivered to the output 3 as the composite video signal VBSo of perfect form.
COPYRIGHT: (C)1979,JPO&Japio
JP80978A 1978-01-10 1978-01-10 Video mixing amplifier Pending JPS5494227A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP80978A JPS5494227A (en) 1978-01-10 1978-01-10 Video mixing amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP80978A JPS5494227A (en) 1978-01-10 1978-01-10 Video mixing amplifier

Publications (1)

Publication Number Publication Date
JPS5494227A true JPS5494227A (en) 1979-07-25

Family

ID=11484002

Family Applications (1)

Application Number Title Priority Date Filing Date
JP80978A Pending JPS5494227A (en) 1978-01-10 1978-01-10 Video mixing amplifier

Country Status (1)

Country Link
JP (1) JPS5494227A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56166683A (en) * 1980-05-26 1981-12-21 Matsushita Electric Ind Co Ltd Processing circuit for color television signal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56166683A (en) * 1980-05-26 1981-12-21 Matsushita Electric Ind Co Ltd Processing circuit for color television signal

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