JPS63102370U - - Google Patents
Info
- Publication number
- JPS63102370U JPS63102370U JP19688786U JP19688786U JPS63102370U JP S63102370 U JPS63102370 U JP S63102370U JP 19688786 U JP19688786 U JP 19688786U JP 19688786 U JP19688786 U JP 19688786U JP S63102370 U JPS63102370 U JP S63102370U
- Authority
- JP
- Japan
- Prior art keywords
- input
- changeover switch
- antenna
- absence
- determines
- 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
Description
第１図は、この考案の入力切り替え回路を適用
したビデオテープレコーダの一実施例を示す回路
構成図、第２図は、従来の入力切り替え回路を適
用したビデオテープレコーダの一例を示す回路構
成図である。
２……アンテナ入力端子、３……外部入力端子
、５……入力切り替えスイツチ、６……映像信号
処理回路、１１……入力切り替え回路、１２……
判別回路。
FIG. 1 is a circuit configuration diagram showing an example of a video tape recorder to which the input switching circuit of this invention is applied, and FIG. 2 is a circuit configuration diagram showing an example of a video tape recorder to which the conventional input switching circuit is applied. It is. 2... Antenna input terminal, 3... External input terminal, 5... Input switching switch, 6... Video signal processing circuit, 11... Input switching circuit, 12...
Discrimination circuit.
Claims (1)
回路に選択的に切り替え接続する入力切り替えス
イツチと、アンテナ入力の有無を同期信号の有無
で判別し、アンテナ入力無しの判別出力により前
記入力切り替えスイツチを強制的に外部入力系側
に切り替える判別回路とからなる入力切り替え回
路。 An input changeover switch that selectively connects an antenna input system and an external input system to a video signal processing circuit; and an input changeover switch that determines the presence or absence of an antenna input based on the presence or absence of a synchronization signal, and switches the input changeover switch based on an output that determines that there is no antenna input. An input switching circuit consisting of a discrimination circuit that forcibly switches to the external input system side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19688786U JPS63102370U (en) | 1986-12-22 | 1986-12-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19688786U JPS63102370U (en) | 1986-12-22 | 1986-12-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63102370U true JPS63102370U (en) | 1988-07-04 |
Family
ID=31156103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19688786U Pending JPS63102370U (en) | 1986-12-22 | 1986-12-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63102370U (en) |
-
1986
- 1986-12-22 JP JP19688786U patent/JPS63102370U/ja active Pending
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