Patent ID: 7835716

Claim:
A radio frequency (RF) receiver comprising: a noise phase removing unit that generates a phase controlled local signal in which a phase of a local signal is controlled by a synthesis of a received signal and the local signal; and a down converter that synthesizes and frequency-down converts the received signal and the phase controlled local signal, wherein frequency down conversion of the received signal and the phase controlled local signal is controlled to remove a DC offset, which results from a noise signal that is introduced into the received signal, by controlling a phase of the phase controlled local signal, and the noise phase removing unit comprises: a mixer that synthesizes the received signal and the phase controlled local signal; a low pass filter connected to an output of the mixer; and a phase control unit that generates the phase controlled local signal by controlling the phase of the local signal according to an output of the low pass filter, said phase control unit outputting the phase controlled local signal that is generated to the mixer and the down converter.