Title:
SIGNAL SENDING CIRCUIT SIMULATING OPTICAL COUPLER
Document Type and Number:
WIPO Patent Application WO/2022/016738
Kind Code:
A1
Abstract:
A signal sending circuit simulating an optical coupler. The signal sending circuit comprises a reverse voltage protection module (1), voltage clamping module (2), and an isolated transmission module (3) connected in sequence. The reverse voltage protection module (1) is communicated with a positive electrode of a power supply to transmit a current signal to the voltage clamping module (2). The voltage clamping module (2) comprises a positive temperature coefficient branch and a negative temperature coefficient branch connected in series to each other, and an output voltage of the voltage clamping module (2) is the sum of a positive temperature coefficient voltage on either end of the positive temperature coefficient branch and a negative temperature coefficient voltage on either end of the negative temperature coefficient branch. The reverse voltage protection module (1) is provided first to prevent a voltage of a negative electrode of the power supply from being greater than that of the positive electrode of the power supply; this is equivalent to simulating a reverse bias cut-off characteristic of an optical coupler. Moreover, by adjusting parameters in the positive temperature coefficient branch and the negative temperature coefficient branch, the output voltage of the voltage clamping module (2) can be made close to a zero temperature coefficient, thereby improving the accuracy and delay of an output voltage.
Inventors:
GONG XIAOHAN (CN)
SHENG YUN (CN)
SHENG YUN (CN)
Application Number:
PCT/CN2020/126059
Publication Date:
January 27, 2022
Filing Date:
November 03, 2020
Export Citation:
Assignee:
SUZHOU NOVOSENSE MICROELECTRONICS CO LTD (CN)
International Classes:
G05F1/567
Foreign References:
| CN212341759U | 2021-01-12 | |||
| CN102931833A | 2013-02-13 | |||
| CN106020318A | 2016-10-12 | |||
| CN106125811A | 2016-11-16 | |||
| US7602161B2 | 2009-10-13 | |||
| US9939827B1 | 2018-04-10 |
Attorney, Agent or Firm:
SUZHOU WISPRO INTELLECTUAL PROPERTY AGENCY (CN)
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