US 12,218,645 B2
Isolation communications channel using direct demodulation and data-edge encoding
Huanhui Zhan, Austin, TX (US); and Krishna Pentakota, Austin, TX (US)
Assigned to Skyworks Solutions, Inc., Irvine, CA (US)
Filed by Skyworks Solutions, Inc., Irvine, CA (US)
Filed on May 15, 2023, as Appl. No. 18/197,407.
Application 18/197,407 is a continuation of application No. 17/335,839, filed on Jun. 1, 2021, granted, now 11,689,174.
Prior Publication US 2023/0402984 A1, Dec. 14, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H03H 7/01 (2006.01); H03B 5/12 (2006.01); H04B 1/40 (2015.01)
CPC H03H 7/0115 (2013.01) [H03B 5/1212 (2013.01); H04B 1/40 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A communication apparatus comprising:
an isolation barrier between a first voltage domain and a second voltage domain;
a transmitter circuit in the first voltage domain and including an oscillator circuit configured to provide an oscillating differential transmit signal for transmission across the isolation barrier;
a receiver circuit in the second voltage domain and configured to receive the oscillating differential transmit signal as a received signal, the receiver circuit including a filter circuit configured to filter the received signal to provide a filtered signal, and a demodulator circuit configured to demodulate the filtered signal to provide a demodulated received signal, the filter circuit including one or more LC components that are matched to one or more LC components of the oscillator circuit.