Patent ID: 7292827

Claim:
An input/output circuit for a wireless transceiver, comprising: a differential balun having first and second differential balun inputs and first and second differential balun outputs; an antenna connected to the first and second differential balun outputs; a differential transmitter amplifier having a first transmitter output connected to the first differential balun input, and a second transmitter output connected to the second differential balun input; a single-ended receiver low noise amplifier having a receiver input connected to the first differential balun input; and a grounding switch connected between the second differential balun input and ground, wherein during a transmit mode the grounding switch is open, the differential transmitter amplifier is turned on, and the single-ended receiver low noise amplifier is turned off, and wherein during a receive mode the grounding switch is closed and the differential transmitter amplifier is turned off, and the single-ended receiver low noise amplifier is turned on.