Patent ID: 9300352
Filing Date: 2016-03-29
CPC Classification: H04B

Claim Text:
1. A wireless communications transceiver, comprising: a transceiver integrated circuit comprising a transmitter with transmitter signal path and a receiver with receiver signal path; an antenna, external to the transceiver integrated circuit, selectively connected in a transmission mode to the transmitter signal path and in reception mode to the receiver signal path, the antenna selectively connected, in the transmission mode, to the transmitter signal path by a series switch (ON) located within the transceiver integrated circuit in the transmitter signal path and isolated from the receiver signal path by at least a switched (ON) parallel resonant circuit that presents a high impedance load to the transmitter, and in the reception mode, both the series switch and the switch for the parallel resonant circuit are (OFF) to prevent signal loss, the series switch including electrostatic discharge (ESD) protection circuitry comprising a plurality of diodes connected between a gate and drain, and gate and source, of the series switch; and a high-Q matching network, comprising one or more elements external to the transceiver integrated circuit and connected between the antenna and the receiver signal path, the one or more elements comprising at least an external LNA input inductor resonating with a capacitance of the parallel resonant circuit at a transmission frequency of interest so that minimal transmit power is dissipated in the receiver signal path.