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Title:
PROTECTION CIRCUIT FOR COMMON-MODE TRANSIENT IMMUNITY OF DIGITAL ISOLATOR
Document Type and Number:
WIPO Patent Application WO/2021/232672
Kind Code:
A1
Abstract:
A protection circuit for common-mode transient immunity of a digital isolator, comprising a modulation circuit, a demodulation circuit (3) and an isolation capacitor (4) connected between the modulation circuit and the demodulation circuit (3); the modulation circuit comprises a modulation circuit front-end (21) and a drive circuit (22) which are connected in sequence, the drive circuit (22) is internally provided with a clamping module; and the protection circuit further comprises a linear voltage regulator structure (23) connected to the drive circuit (22), and the linear voltage regulator structure (23) is internally provided with a power supply clamper. Said protection circuit is provided with a linear voltage regulator structure (23) provided with a power supply clamper and a drive circuit (22) provided with a clamping module, so that low-voltage devices in the drive circuit (22) can be protected from being damaged by high-voltage signals generated by common-mode transient interference.

Inventors:
CHEN, Qihui (AI Industrial Park No. 88, Jinjihu Avenue, SI, Suzhou Jiangsu 0, CN)
SHENG, Yun (AI Industrial Park No. 88, Jinjihu Avenue, SI, Suzhou Jiangsu 0, CN)
Application Number:
PCT/CN2020/123298
Publication Date:
November 25, 2021
Filing Date:
October 23, 2020
Export Citation:
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Assignee:
SUZHOU NOVOSENSE MICROELECTRONICS CO., LTD. (AI Industrial Park No. 88, Jinjihu Avenue, SI, Suzhou Jiangsu 0, CN)
International Classes:
H03K19/003
Attorney, Agent or Firm:
SUZHOU WISPRO INTELLECTUAL PROPERTY AGENCY (Unit A1502 International Science and Technology,Park, No.1355, Jinjihu Avenue, Suzhou Industrial Par, Suzhou Jiangsu 1, CN)
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