Patent ID: 7995970

Claim:
A wireless transceiver for sending and receiving radio frequency (RF) signals, comprising: an antenna that sends and receives the RF signals; a filter connected to the antenna to filter the RF signals; a RF signal processing circuit that outputs a first control signal upon the condition that the antenna is utilized to send the RF signals, and outputs a second control signal upon the condition that the antenna is utilized to receive the RF signals; a shared amplifying circuit comprising an input end connected to an output end of the RF signal processing circuit and an output end connected to an input end of the RF signal processing circuit, the shared amplifying circuit operable to pre-amplify the RF signals upon the condition that the antenna is utilized to send the RF signals, and amplify the RF signals upon the condition that the antenna is utilized to receive the RF signals; a first switch circuit connected to the output end of the shared amplifying circuit, wherein the first switch circuit switches on upon receiving the first control signal from the RF signal processing circuit; a second switch circuit connected to the input end of the shared amplifying circuit, wherein the second switch circuit switches on upon receiving the second control signal from the RF signal processing circuit; a sending power amplifier with an input end connected to the first switch circuit, the sending power amplifier operable to further amplify the RF signals pre-amplified by the shared amplifying circuit upon the condition that the first switch circuit switches on; and a single-pole double-throw (SPDT) switch with a common terminal connected to the filter, a first terminal connected to an output end of the sending power amplifier, and a second terminal connected to the second switch circuit, the SPDT switch connecting the common terminal to the first terminal according to the first control signal from the RF signal processing circuit, and connecting the common terminal to the second terminal according to the second control signal from the RF signal processing circuit.