JPH01121870U - - Google Patents
Info
- Publication number
- JPH01121870U JPH01121870U JP1646288U JP1646288U JPH01121870U JP H01121870 U JPH01121870 U JP H01121870U JP 1646288 U JP1646288 U JP 1646288U JP 1646288 U JP1646288 U JP 1646288U JP H01121870 U JPH01121870 U JP H01121870U
- Authority
- JP
- Japan
- Prior art keywords
- input
- stage
- voltage
- detection circuit
- voltage detection
- 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
- 238000001514 detection method Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Measurement Of Current Or Voltage (AREA)
Description
第１図はこの考案の一実施例を示す電圧検出回
路の回路図、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図は従来の電圧検出回路を
示す回路図、第４図は第３図の従来の回路の動作
を示すタイムチヤートである。
１……入力端子、２，５……アース端子、３…
…出力１端子、４……出力２端子、１３，１４…
…ホトカプラ、２３，２４……ツエナーダイオー
ド。なお、各図中、同一符号は同一又は相当部分
を示す。
Fig. 1 is a circuit diagram of a voltage detection circuit showing an embodiment of this invention, Fig. 2 is a time chart showing the operation of the circuit of Fig. 1, and Fig. 3 is a circuit diagram showing a conventional voltage detection circuit. FIG. 4 is a time chart showing the operation of the conventional circuit shown in FIG. 1...Input terminal, 2, 5...Earth terminal, 3...
...Output 1 terminal, 4...Output 2 terminal, 13, 14...
...Photocoupler, 23, 24... Zener diode. In each figure, the same reference numerals indicate the same or equivalent parts.
Claims (1)
により３状態の電圧変化として検出する電圧検出
回路において、上記入力段と出力段とを、光電変
換回路を介し接続して電気的に絶縁したことを特
徴とする電圧検出回路。 In a voltage detection circuit that detects a change in the input voltage input to the input stage as a three-state voltage change by the output stage, the input stage and the output stage are electrically isolated by being connected through a photoelectric conversion circuit. A voltage detection circuit characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1646288U JPH01121870U (en) | 1988-02-10 | 1988-02-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1646288U JPH01121870U (en) | 1988-02-10 | 1988-02-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01121870U true JPH01121870U (en) | 1989-08-18 |
Family
ID=31229419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1646288U Pending JPH01121870U (en) | 1988-02-10 | 1988-02-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01121870U (en) |
-
1988
- 1988-02-10 JP JP1646288U patent/JPH01121870U/ja active Pending