Invention Grant
- Patent Title: Receiver architecture for digital isolators employing notch filters common mode transient immunity
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Application No.: US15683873Application Date: 2017-08-23
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Publication No.: US10397025B2Publication Date: 2019-08-27
- Inventor: Mohammad Al-Shyoukh , Stefan Mastovich
- Applicant: Silicon Laboratories Inc.
- Applicant Address: US TX Austin
- Assignee: Silicon Laboratories Inc.
- Current Assignee: Silicon Laboratories Inc.
- Current Assignee Address: US TX Austin
- Agency: Zagorin Cave LLP
- Main IPC: H04L25/02
- IPC: H04L25/02 ; H03H7/01 ; H03H7/06 ; H03H11/04 ; H03H11/38 ; H04B1/10 ; H04L25/08 ; H04L27/06

Abstract:
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.
Public/Granted literature
- US20190068410A1 RECEIVER ARCHITECTURE FOR DIGITAL ISOLATORS EMPLOYING NOTCH FILTERS FOR COMMON MODE TRANSIENT IMMUNITY Public/Granted day:2019-02-28
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