- 专利标题: RECEIVER ARCHITECTURE FOR DIGITAL ISOLATORS EMPLOYING NOTCH FILTERS FOR COMMON MODE TRANSIENT IMMUNITY
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申请号: US15683873申请日: 2017-08-23
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公开(公告)号: US20190068410A1公开(公告)日: 2019-02-28
- 发明人: Mohammad Al-Shyoukh , Stefan Mastovich
- 申请人: Silicon Laboratories Inc.
- 主分类号: H04L25/02
- IPC分类号: H04L25/02 ; H03H11/04 ; H03H7/06 ; H03H7/01 ; H03H11/38 ; H04L25/08 ; H04L27/06 ; H04B1/10
摘要:
A technique for attenuating common mode transient events uses a differential receiver circuit including a band-stop filter having a stopband fSB around a notch frequency fn of a received signal. The differential receiver circuit includes a first high-pass filter coupled in series with the band-stop filter. The notch frequency fn is less than a carrier frequency fc of a signal received by the differential receiver circuit. The band-stop filter may include a buffer circuit and a notch filter coupled in series with the buffer circuit. The notch filter may have a second stopband around the notch frequency fn. The differential receiver circuit may have a propagation delay that is independent of a pulse width of common mode transient energy attenuated by the differential receiver circuit.