JPS59129270U - Video signal switching circuit - Google Patents
Video signal switching circuitInfo
- Publication number
- JPS59129270U JPS59129270U JP2340383U JP2340383U JPS59129270U JP S59129270 U JPS59129270 U JP S59129270U JP 2340383 U JP2340383 U JP 2340383U JP 2340383 U JP2340383 U JP 2340383U JP S59129270 U JPS59129270 U JP S59129270U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- switching circuit
- video signal
- signal switching
- input terminals
- 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
- Video Image Reproduction Devices For Color Tv Systems (AREA)
- Electronic Switches (AREA)
- Studio Circuits (AREA)
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
第１図は従来の映像信号の切換回路の一例を示す回路図
、第２図は第１図の回路の動作を説明するためのタイム
チャート、第３図は本考案の一実施例を示す回路図、第
４図及び第５図は第３図の回路の動作を説明するための
タイムチャート、第６図及び第７図は第３図の電流源の
それぞれ異なる構成例を示す回路図である。
１１Ｒ，１１Ｇ、 １１Ｂ、 ２１・・・・・・入力
端子、１２Ｒ，１２Ｇ、１２Ｂ、１５．２２・・・・・
・ダイオード、１３Ｒ，１３Ｇ、１３Ｂ、２０．２３・
・・・・・トランジスタ、１６・・・・・・ベース接地
トランジスタ。Fig. 1 is a circuit diagram showing an example of a conventional video signal switching circuit, Fig. 2 is a time chart for explaining the operation of the circuit shown in Fig. 1, and Fig. 3 is a circuit showing an embodiment of the present invention. Figures 4 and 5 are time charts for explaining the operation of the circuit in Figure 3, and Figures 6 and 7 are circuit diagrams showing different configuration examples of the current source in Figure 3. . 11R, 11G, 11B, 21... Input terminal, 12R, 12G, 12B, 15.22...
・Diode, 13R, 13G, 13B, 20.23・
...transistor, 16... common base transistor.
Claims (1)
れ供給される複数の入力端子と、これらの入力端子にそ
れぞれ一端が接続されそれぞれの他端が共通接続された
複数のダイオードと、上記各入力端子と接地端子との間
にそれぞれ挿入接続された複数のスイッチング手段と、
上記各ダイオードの共通接続端子に接続された低インピ
ーダンス回路上を備え、上記複数のスイッチング手段を
選択的にオフさせることにより上記複数の映像信号のう
ちのいずれかを上記ダイオードを介して上記低インピー
ダンス回路に送るようにして成る映像信号の切換回路。A plurality of input terminals to which a plurality of video signals to be switched and selected are respectively supplied as current signals, a plurality of diodes each having one end connected to each of these input terminals and the other end thereof being commonly connected, and each of the above-mentioned input terminals. a plurality of switching means each inserted between and connected to the ground terminal;
A low impedance circuit is connected to a common connection terminal of each of the diodes, and by selectively turning off the plurality of switching means, any one of the plurality of video signals is transmitted to the low impedance circuit through the diode. A switching circuit for video signals sent to the circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2340383U JPS59129270U (en) | 1983-02-19 | 1983-02-19 | Video signal switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2340383U JPS59129270U (en) | 1983-02-19 | 1983-02-19 | Video signal switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59129270U true JPS59129270U (en) | 1984-08-30 |
Family
ID=30154488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2340383U Pending JPS59129270U (en) | 1983-02-19 | 1983-02-19 | Video signal switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59129270U (en) |
-
1983
- 1983-02-19 JP JP2340383U patent/JPS59129270U/en active Pending
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