Title:
ISOLATED FEEDBACK CIRCUIT FOR DETECTING OUTPUT STATE OF OPTOCOUPLER
Document Type and Number:
WIPO Patent Application WO/2023/231108
Kind Code:
A1
Abstract:
An isolated feedback circuit for detecting the output state of an optocoupler, which is applied to an optocoupler module connected to a load. The circuit comprises a main control module, an isolated feedback module, a current detection module, a current upper limit comparison module, a current lower limit comparison module, a voltage detection module and a voltage comparison module. The optocoupler module is further connected to the main control module and the current detection module. The current detection module is respectively connected to the current upper limit comparison module and the current lower limit comparison module. The voltage detection module is connected to the load in parallel, and the voltage detection module is connected to the voltage comparison module. The current upper limit comparison module, the current lower limit comparison module and the voltage comparison module are all connected to the isolated feedback module. The isolated feedback module is connected to the main control module. The present invention provides real-time clarity of the output state of the output terminal of the optocoupler module, such that the anomaly of the output terminal of the optocoupler module can be known in time, the impact on the normal signal output can be reduced and the safety issues can be avoided.
Inventors:
LI ZHIRONG (CN)
Application Number:
PCT/CN2022/101775
Publication Date:
December 07, 2023
Filing Date:
June 28, 2022
Export Citation:
Assignee:
OPT MACHINE VISION TECH CO LTD (CN)
International Classes:
G01R31/00; G01R19/165
Foreign References:
| CN217879448U | 2022-11-22 | |||
| US20120206433A1 | 2012-08-16 | |||
| CN214125565U | 2021-09-03 | |||
| CN111436174A | 2020-07-21 | |||
| CN202373972U | 2012-08-08 | |||
| JP2002051550A | 2002-02-15 | |||
| CN109712574A | 2019-05-03 | |||
| CN202210612350A | 2022-05-31 |
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
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