COMMUNICATION BETWEEN CAPACITIVE-ISOLATED DEVICES

摘要

Aspects of the present disclosure are directed to circuits, apparatuses and methods for communicating data between capacitive-isolated devices. According to an example embodiment, an apparatus includes a transmitter circuit configured to transmit a first single-ended data signal over a first signal path. The apparatus also includes a receiver circuit. The receiver circuit includes a differential amplifier having a first input coupled to receive a second single-ended signal from a second signal path of the plurality of signal paths and includes a second input coupled to receive a reference signal from a third signal path of the plurality of signal paths. The differential amplifier outputs a third single-ended signal indicative of a voltage difference between the first and second inputs. The receiver circuit also includes a common mode suppression circuit configured to remove a common mode voltage from the first and second inputs of the differential amplifier.

主权项

1. An apparatus for communicating data signals between capacitive-isolated devices, comprising:
a transmitter circuit configured and arranged to transmit a first single-ended data signal over a first signal path of a plurality of signal paths that provide capacitive isolation between the devices; and a receiver circuit including
a differential amplifier having
a first input coupled to receive a second single-ended signal from a second signal path of the plurality of signal paths,a second input coupled to receive a reference signal from a third signal path of the plurality of signal paths, andconfigured and arranged to output a third single-ended signal indicative of a voltage difference between the first and second inputs; anda common mode suppression circuit, configured and arranged to remove a common mode voltage from the first and second inputs of the differential amplifier.