JPS6430970U - - Google Patents
Info
- Publication number
- JPS6430970U JPS6430970U JP1987126516U JP12651687U JPS6430970U JP S6430970 U JPS6430970 U JP S6430970U JP 1987126516 U JP1987126516 U JP 1987126516U JP 12651687 U JP12651687 U JP 12651687U JP S6430970 U JPS6430970 U JP S6430970U
- Authority
- JP
- Japan
- Prior art keywords
- ground
- circuit
- input
- signal
- sub
- 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
- 238000010586 diagram Methods 0.000 description 2
Description
第１図はこの考案の入力切換回路の１実施例の
結線図、第２図は従来のビデオテープレコーダの
ＲＦコンバータ部の結線図である。
８…テスト信号発生器、９…ＲＦ変調器、１０
…入力端子、１２ａ，１２ｂ…分割グランド極、
１３…切換制御回路、１４…テスト信号用切換ス
イツチ、Ｅ…共通のアースライン。
FIG. 1 is a wiring diagram of one embodiment of the input switching circuit of this invention, and FIG. 2 is a wiring diagram of an RF converter section of a conventional video tape recorder. 8...Test signal generator, 9...RF modulator, 10
...input terminal, 12a, 12b...divided ground pole,
13...Switching control circuit, 14...Test signal changeover switch, E...Common earth line.
Claims (1)
出力信号に切換える入力切換回路において、 前記入力端子の環状のグランド極を電気的に絶
縁された２個の分割グランド極によつて形成する
とともに、一方の前記分割グランド極を前記主、
副回路の共通のアースラインに接続し、 かつ、アース端子が他方の前記分割グランド極
に接続され、前記アース端子が前記両分割グラン
ド極を介して前記共通のアースラインに接続され
たときに動作して切換制御信号を出力する切換制
御回路と、 前記入力端子の信号と前記副回路の出力信号が
２接点それぞれに入力されるとともに切換片が前
記主回路に接続され、前記制御信号によつて切換
えられる切換スイツチとを備えた入力切換回路。[Claims for Utility Model Registration] In an input switching circuit that switches an input signal of a main circuit to a signal of an input terminal and an output signal of a sub-circuit, an annular ground pole of the input terminal is divided into two electrically insulated parts. one of the divided ground poles is formed by a ground pole, and one of the divided ground poles is formed by the main
It operates when connected to a common ground line of the sub circuit, and the ground terminal is connected to the other split ground pole, and the ground terminal is connected to the common ground line via both split ground poles. a switching control circuit that outputs a switching control signal; a signal from the input terminal and an output signal from the sub-circuit are input to each of two contacts, and a switching piece is connected to the main circuit; An input switching circuit with a selector switch that can be switched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987126516U JPS6430970U (en) | 1987-08-20 | 1987-08-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987126516U JPS6430970U (en) | 1987-08-20 | 1987-08-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6430970U true JPS6430970U (en) | 1989-02-27 |
Family
ID=31378108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987126516U Pending JPS6430970U (en) | 1987-08-20 | 1987-08-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6430970U (en) |
-
1987
- 1987-08-20 JP JP1987126516U patent/JPS6430970U/ja active Pending
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