JPS5494227A - Video mixing amplifier - Google Patents
Video mixing amplifierInfo
- 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
Links
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
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)
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 |
-
1978
- 1978-01-10 JP JP80978A patent/JPS5494227A/en active Pending
Cited By (1)
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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