Receiver and receiving method of the receiver

A receiver comprising:

• a first A/D converter which A/D-converts a first analog signal inputted from 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 A/D converter which A/D-converts a second analog signal inputted from 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 first analog signal is inputted, the first A/D converter is controlled to an active state, and the second A/D converter is controlled to a low power consumption state, and
• wherein, after the first analog signal is inputted, the second A/D converter 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.