Patent ID: 8145168
Filing Date: 2012-03-27
Classification: H04B

Abstract:
1. A wireless transceiver, comprising: a receiving part that has an amplifying circuit that amplifies a received signal and an analog-to-digital converting circuit that converts the signal amplified by the amplifying circuit from analog to digital; a transmitting part that has a plurality of circuit blocks having different functions for transmitting a signal by wireless; a switch that performs switching among output signals of the circuit blocks forming the transmitting part for selective input thereof to the amplifying circuit; a DC offset compensating part capable of compensating for a DC offset occurring in the amplifying circuit; and a controlling circuit that performs control to cancel or reduce a DC offset occurring in each of the plurality of circuit blocks based on a digital signal output from the analog-to-digital converting circuit when the output signal of each of the plurality of circuit blocks forming the transmitting part is selectively input to the amplifying circuit, wherein the DC offset compensating part has an offset canceling part that holds a state in which a DC offset occurring in the amplifying circuit, when a signal is input to the amplifying circuit, is canceled.