JPS63120474U - - Google Patents
Info
- Publication number
- JPS63120474U JPS63120474U JP1061487U JP1061487U JPS63120474U JP S63120474 U JPS63120474 U JP S63120474U JP 1061487 U JP1061487 U JP 1061487U JP 1061487 U JP1061487 U JP 1061487U JP S63120474 U JPS63120474 U JP S63120474U
- Authority
- JP
- Japan
- Prior art keywords
- switching
- circuit
- mute
- switching means
- operation detection
- 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
- 238000001514 detection method Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Description
第１図は、本考案による映像信号切換回路の一
実施例を示すブロツク図、第２図は、第１図に示
す回路の動作を説明する波形図、第３図は、従来
の映像信号切換回路を示すブロツク図である。
２…切換スイツチ、３…同期分離回路、５…映
像出力回路、６…ＣＲＴ、７…モノマルチバイブ
レーター、８…モノマルチバイブレーター、９…
ミユート回路。
FIG. 1 is a block diagram showing an embodiment of the video signal switching circuit according to the present invention, FIG. 2 is a waveform diagram explaining the operation of the circuit shown in FIG. 1, and FIG. 3 is a conventional video signal switching circuit. FIG. 3 is a block diagram showing the circuit. 2... Selector switch, 3... Synchronous separation circuit, 5... Video output circuit, 6... CRT, 7... Mono multivibrator, 8... Mono multivibrator, 9...
Miyuto circuit.
Claims (1)
切換える切換手段と、該切換手段と映像出力回路
との間に設けられたミユート回路と、前記切換手
段が切換操作されたことを検出する切換操作検出
回路とを有し、該切換操作検出回路の出力によつ
て前記ミユート回路のミユート動作を制御するこ
とを特徴とする映像信号切換回路。 A switching means for switching between a plurality of types of input video signals having different scanning frequencies, a mute circuit provided between the switching means and a video output circuit, and a switching operation detection circuit for detecting that the switching means has been switched. 1. A video signal switching circuit comprising: a mute operation of the mute circuit according to an output of the switching operation detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1061487U JPS63120474U (en) | 1987-01-27 | 1987-01-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1061487U JPS63120474U (en) | 1987-01-27 | 1987-01-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63120474U true JPS63120474U (en) | 1988-08-04 |
Family
ID=30797072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1061487U Pending JPS63120474U (en) | 1987-01-27 | 1987-01-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63120474U (en) |
-
1987
- 1987-01-27 JP JP1061487U patent/JPS63120474U/ja active Pending