Described herein is a fully-differential receiver for use with an implantable medical device (IMD) and configured to receive conducted communication signals that are transmitted by another IMD or an external device. The fully-differential receiver includes a fully-differential preamplifier, a fully-differential buffer, a first comparator, a second comparator, and an AC coupling network coupled between differential outputs of the fully-differential buffer and a coupled together differential pair of inputs of the first and second comparators. A differential pair of inputs of the fully-differential receiver comprise the differential pair of inputs of the fully-differential preamplifier, and a differential pair of outputs of the fully-differential receiver comprise a first output of the first comparator and a second output of the second comparator. In order to conserve power, the fully-differential receiver is selectively changed from operating in a first mode to operating in a second mode, and vice versa.