JPS57181228A - Output monitoring circuit - Google Patents
Output monitoring circuitInfo
- Publication number
- JPS57181228A JPS57181228A JP6560681A JP6560681A JPS57181228A JP S57181228 A JPS57181228 A JP S57181228A JP 6560681 A JP6560681 A JP 6560681A JP 6560681 A JP6560681 A JP 6560681A JP S57181228 A JPS57181228 A JP S57181228A
- Authority
- JP
- Japan
- Prior art keywords
- photocoupler
- load
- light emitting
- power source
- emitting diode
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/18—Modifications for indicating state of switch
Landscapes
- Power Conversion In General (AREA)
- Electronic Switches (AREA)
Abstract
PURPOSE:To prevent a load from operating by the consumed current of a light emitting diode by connecting the light emitting element of a photocoupler to a load power source through a current limiting resistance. CONSTITUTION:A series circuit consisting of a resistance R3, the light emitting diode of a photocoupler PC2, and a transistor TR2 is connected across a load power source E2. The base current of the TR2 is applied through a voltage dividing circuit consisting of resistances R4 and R5 interposed between one terminal of a load L and the load of the load power source E2. Once the light emitting diode of the photocoupler PC2 turns on, the phototransistor of the photocoupler which is grounded at its emitter and also applied with electric power at its collector through a pull-up resistance R6 turns on. The phototransistor of the photocoupler PC2 sends out a monitor signal to a control circuit C.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6560681A JPS57181228A (en) | 1981-04-30 | 1981-04-30 | Output monitoring circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6560681A JPS57181228A (en) | 1981-04-30 | 1981-04-30 | Output monitoring circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57181228A true JPS57181228A (en) | 1982-11-08 |
JPS6114691B2 JPS6114691B2 (en) | 1986-04-19 |
Family
ID=13291836
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6560681A Granted JPS57181228A (en) | 1981-04-30 | 1981-04-30 | Output monitoring circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57181228A (en) |
-
1981
- 1981-04-30 JP JP6560681A patent/JPS57181228A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6114691B2 (en) | 1986-04-19 |
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