JPS63173926U - - Google Patents
Info
- Publication number
- JPS63173926U JPS63173926U JP1987068373U JP6837387U JPS63173926U JP S63173926 U JPS63173926 U JP S63173926U JP 1987068373 U JP1987068373 U JP 1987068373U JP 6837387 U JP6837387 U JP 6837387U JP S63173926 U JPS63173926 U JP S63173926U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- signal
- parallel
- photocoupler
- resistor
- 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
- Pulse Circuits (AREA)
- Electronic Switches (AREA)
- Logic Circuits (AREA)
Description
第１図は本考案による信号入力回路の一実施例
を示す結線図、第２図は第１図の回路の動作を示
すタイムチヤート、第３図は本考案の異なる実施
例を示す結線図、第４図は従来の信号入力回路の
一例を示す結線図、第５図は第４図の回路の動作
を示すタイムチヤートである。
３：ホトカプラ、３ｂ：ホトトランジスタ、１
５：放電抵抗、１６：ダイオード、１７：コンデ
ンサ、１９：充電抵抗。
FIG. 1 is a wiring diagram showing one embodiment of a signal input circuit according to the present invention, FIG. 2 is a time chart showing the operation of the circuit of FIG. 1, and FIG. 3 is a wiring diagram showing a different embodiment of the present invention. FIG. 4 is a wiring diagram showing an example of a conventional signal input circuit, and FIG. 5 is a time chart showing the operation of the circuit shown in FIG. 3: Photocoupler, 3b: Phototransistor, 1
5: Discharge resistor, 16: Diode, 17: Capacitor, 19: Charging resistor.
Claims (1)
トカプラを介して所定電圧の内部信号に変換する
信号入力回路において、ダイオードと抵抗との並
列回路にコンデンサを直列に接続した回路を前記
ホトカプラのホトトランジスタのコレクタ・エミ
ツタ通路に並列接続し、ダイオードと抵抗との並
列回路とコンデンサとの接続点を内部信号の出力
としたことを特徴とする信号入力回路。 In a signal input circuit that converts an arbitrary voltage or current input signal from the outside into an internal signal of a predetermined voltage via a photocoupler, a circuit in which a capacitor is connected in series to a parallel circuit of a diode and a resistor is connected to the phototransistor of the photocoupler. A signal input circuit connected in parallel to a collector-emitter path, and characterized in that the connection point between a parallel circuit of a diode and a resistor and a capacitor is used as an output for an internal signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987068373U JPS63173926U (en) | 1987-05-07 | 1987-05-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987068373U JPS63173926U (en) | 1987-05-07 | 1987-05-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63173926U true JPS63173926U (en) | 1988-11-11 |
Family
ID=30908129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987068373U Pending JPS63173926U (en) | 1987-05-07 | 1987-05-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63173926U (en) |
-
1987
- 1987-05-07 JP JP1987068373U patent/JPS63173926U/ja active Pending
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