JPH0253636U - - Google Patents
Info
- Publication number
- JPH0253636U JPH0253636U JP13108388U JP13108388U JPH0253636U JP H0253636 U JPH0253636 U JP H0253636U JP 13108388 U JP13108388 U JP 13108388U JP 13108388 U JP13108388 U JP 13108388U JP H0253636 U JPH0253636 U JP H0253636U
- Authority
- JP
- Japan
- Prior art keywords
- external input
- switch
- selecting
- signal
- control
- 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
Landscapes
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
- Electronic Switches (AREA)
Description
第１図はこの考案の一実施例による外部入力信
号切換回路の回路図、第２図はこの考案における
論理回路の論理値表を示した説明図、第３図は従
来の外部入力信号切換回路の回路図である。
図において、１は第１外部入力端子、２は第２
外部入力端子、３，４，１１はスイツチ、７は映
像信号入力処理回路、８はＣＲＴ、９は第１外部
入力コントロール端子、１０は第２外部入力コン
トロール端子、１２はマイクロコンピユータ、１
６は論理回路である。なお、図中、同一符号は同
一、又は相当部分を示す。
Fig. 1 is a circuit diagram of an external input signal switching circuit according to an embodiment of this invention, Fig. 2 is an explanatory diagram showing a logic value table of the logic circuit in this invention, and Fig. 3 is a conventional external input signal switching circuit. FIG. In the figure, 1 is the first external input terminal, 2 is the second external input terminal
External input terminals, 3, 4, and 11 are switches, 7 is a video signal input processing circuit, 8 is a CRT, 9 is a first external input control terminal, 10 is a second external input control terminal, 12 is a microcomputer, 1
6 is a logic circuit. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.
Claims (1)
の外部入力端子と、 前記外部入力信号を選択するためのコントロー
ル信号を入力する複数の外部入力コントロール端
子と、 前記外部入力信号を選択するためのスイツチと
、 前記外部入力コントロール端子に印加されるコ
ントロール信号を入力とし、前記スイツチを制御
するための信号を出力する論理回路とを備え、 前記スイツチは前記論理回路の出力により制御
されることを特徴とする外部入力信号切換回路。[Claims for Utility Model Registration] A plurality of external input terminals provided corresponding to a plurality of external input signals; a plurality of external input control terminals into which control signals for selecting the external input signals are input; a switch for selecting an external input signal; and a logic circuit that inputs a control signal applied to the external input control terminal and outputs a signal for controlling the switch, the switch comprising: a switch for selecting an external input signal; An external input signal switching circuit characterized by being controlled by an output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13108388U JPH0253636U (en) | 1988-10-06 | 1988-10-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13108388U JPH0253636U (en) | 1988-10-06 | 1988-10-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0253636U true JPH0253636U (en) | 1990-04-18 |
Family
ID=31386824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13108388U Pending JPH0253636U (en) | 1988-10-06 | 1988-10-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0253636U (en) |
-
1988
- 1988-10-06 JP JP13108388U patent/JPH0253636U/ja active Pending