Isolation communications channel using direct demodulation and data-edge encoding
AssigneeSkyworks Solutions, Inc.
InventorsHuanhui Zhan, Krishna Pentakota
Life of this patent
Estimating the term…
Abstract
An apparatus for communicating across an isolation barrier includes a differential pair of input terminals. The apparatus includes a bandpass filter circuit configured to receive a received signal on the differential pair of input terminals and to provide a received differential signal on a differential pair of nodes. The apparatus includes a demodulator directly coupled to the bandpass filter circuit and configured to directly demodulate the received differential signal on the differential pair of nodes to provide a demodulated received signal.
Claims20
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.
A method for communicating across an isolation barrier, the method comprising:
- transmitting an oscillating differential transmit signal across an isolation barrier from a first voltage domain to a second voltage domain;
- receiving the oscillating differential transmit signal as a received signal;
- filtering the received signal with a filter circuit to provide a filtered signal, the filter circuit including one or more LC components that are matched to one or more LC components of an oscillator circuit that is configured to generate the oscillating differential transmit signal;
- and
- demodulating the filtered signal with a demodulator circuit to provide a demodulated received signal.
Dependencies are inferred from the claim text.