Patent ID: 9614575
Date: 2017-04-04
CPC Classifications: H03F,H04B

Claim:
1. A communications front end, configured to transmit a transmitted component of a bidirectional communications signal over a shared medium, and to receive a received component of the bidirectional communications signal from the shared medium, comprising: a transmission amplifier configured to provide the transmitted component of the bidirectional communications signal in a transmit mode of operation; a reception amplifier, having an input coupled to an output of the transmission amplifier to form a common connection, configured to provide the received component of the bidirectional communications signal in a receive mode of operation; and one or more bias networks configured to provide a first amplifier bias to the common connection and a transmission bias to an input of the transmission amplifier during the transmit mode of operation or a second amplifier bias that is less than the first amplifier bias to the common connection and a reception bias to an output of the reception amplifier during the receive mode of operation and to cause the transmission amplifier to operate in the transmit mode of operation when the transmission bias is less than the first amplifier bias and the reception amplifier to operate in the reception mode of operation when the reception bias is greater than the second amplifier bias, wherein the transmission amplifier comprises: wherein the reception amplifier comprises: