JPH0365329U - - Google Patents
Info
- Publication number
- JPH0365329U JPH0365329U JP12756489U JP12756489U JPH0365329U JP H0365329 U JPH0365329 U JP H0365329U JP 12756489 U JP12756489 U JP 12756489U JP 12756489 U JP12756489 U JP 12756489U JP H0365329 U JPH0365329 U JP H0365329U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- transistor
- emitter
- transistors
- base
- 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 3
Landscapes
- Electronic Switches (AREA)
Description
第１図は本考案の原理を示す回路図、第２図は
本考案の実施例を示す回路図、第３図は信号切替
回路の一例を示す回路図である。
図中、１……マイコン、２……バツクアツプ回
路、３……ウオツチドツグ回路、４……ソレノイ
ド、５……信号切替回路、ＴＲ１，ＴＲ２，ＴＲ
３……トランジスタ。
FIG. 1 is a circuit diagram showing the principle of the invention, FIG. 2 is a circuit diagram showing an embodiment of the invention, and FIG. 3 is a circuit diagram showing an example of a signal switching circuit. In the figure, 1...Microcomputer, 2...Backup circuit, 3...Watchdog circuit, 4...Solenoid, 5...Signal switching circuit, TR1, TR2, TR
3...Transistor.
Claims (1)
て選択した方の信号を出力する信号切替回路にお
いて、 第１の信号がベースに与えられる第１トランジ
スタと、 第２の信号がそのエミツタに与えられ、第１ト
ランジスタのエミツタがそのベースに接続され、
第１トランジスタのコレクタがそのコレクタに接
続される第２トランジスタと、 第１及び第２トランジスタのコレクタに接続さ
れたプルアツプ又はプルダウン抵抗とを具備し、 前記第１トランジスタのエミツタと第２トラン
ジスタのベースとの接続点に前記気替信号を与え
、前記第１及び第２トランジスタのコレクタによ
り信号を出力するようにしたことを特徴とする信
号切替回路。[Claims for Utility Model Registration] In a signal switching circuit that outputs a signal selected by a switching signal between a first signal and a second signal, a first transistor whose base is given the first signal; and a second signal is applied to its emitter, the emitter of the first transistor is connected to its base,
a second transistor having a collector connected to the collector of the first transistor; and a pull-up or pull-down resistor connected to the collectors of the first and second transistors, the emitter of the first transistor and the base of the second transistor. A signal switching circuit characterized in that the changeover signal is applied to a connection point between the first and second transistors, and the signal is outputted by the collectors of the first and second transistors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12756489U JPH0365329U (en) | 1989-10-30 | 1989-10-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12756489U JPH0365329U (en) | 1989-10-30 | 1989-10-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0365329U true JPH0365329U (en) | 1991-06-25 |
Family
ID=31675317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12756489U Pending JPH0365329U (en) | 1989-10-30 | 1989-10-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0365329U (en) |
-
1989
- 1989-10-30 JP JP12756489U patent/JPH0365329U/ja active Pending
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