Patent ID: 8301208

Claim:
A receiver comprising: a first signal processing unit which generates a first conversion signal by detecting an in-phase or quadrature signal from a quadrature modulation signal inputted to the first signal processing unit; a second signal processing unit which generates a second conversion signal by detecting a signal having a phase difference of about 90 degrees with respect to the first conversion signal from the quadrature modulation signal inputted to the second signal processing unit; and a signal level detection unit which generates a reception start signal by receiving the first conversion signal, wherein, before the quadrature modulation signal is inputted, the first signal processing unit is controlled to an active state, and the second signal processing unit is controlled to a low power consumption state, and wherein, after the quadrature modulation signal is inputted, the second signal processing unit is controlled to an active state from the low power consumption state in response to the reception start signal generated by the signal level detection unit to receive a succeeding data signal with both the first and second signal processing units in the active state until an end of the received succeeding data signal regardless of a state of the first and second conversion signals.