Patent ID: 6397051
Filing Date: 2002-05-28
Classification: H03D,H04B

Abstract:
An RF receiver, comprising:a dual image-reject mixer arrangement receiving an RF signal having multi-channels and including a local oscillator for each channel, each local oscillator signal having a frequency component corresponding to each channel of the RF signal, the dual image-reject mixer arrangement providing responses which mirror each other in generating first and second signals corresponding to each channel of the RF signal, the first and second signal corresponding to each channel being substantially equal, and the first and second signals corresponding to each channel including a desired signal, an undesired image frequency signal and an intermodulation signal; attenuation and phase shifting apparatus for canceling the undesired image frequency signal; and a feed-forward arrangement including phase shifters and receiving the first and second signals corresponding to each channel and outputting a third signal, the third signal being formed by constructively combining the desired signals corresponding to each channel and substantially canceling the intermodulation signals corresponding to each channel.