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 (CN)
SHENG YUN (CN)
SHENG YUN (CN)
Application Number:
PCT/CN2020/123298
Publication Date:
November 25, 2021
Filing Date:
October 23, 2020
Export Citation:
Assignee:
SUZHOU NOVOSENSE MICROELECTRONICS CO LTD (CN)
International Classes:
H03K19/003
Foreign References:
| CN111490773A | 2020-08-04 | |||
| CN106961272A | 2017-07-18 | |||
| CN210270587U | 2020-04-07 | |||
| CN101877683A | 2010-11-03 | |||
| CN105790754A | 2016-07-20 | |||
| CN107919861A | 2018-04-17 | |||
| US20180294945A1 | 2018-10-11 |
Attorney, Agent or Firm:
SUZHOU WISPRO INTELLECTUAL PROPERTY AGENCY (CN)
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