Patent ID: 7668517

Claim:
A radio frequency (RF) receiver, comprising: a low noise amplifier (LNA) for receiving and amplifying the radio frequency signal; a local oscillator for supplying a first local oscillator signal; a mixer, coupled to the LNA and the local oscillator, for generating a first intermediate frequency signal in response to the amplified radio frequency signal and the first local oscillator signal; a filter, coupled to the mixer, for filtering the first intermediate frequency signal to develop a first output signal; a first amplifier for amplifying the first output signal; a received signal strength indicator (RSSI) module, coupled to the first amplifier, for generating a RSSI value according to the amplified first output signal; and an automatic gain control (AGC) unit, coupled to the LNA and a received signal strength indicator (RSSI) module, for adjusting the gain of the filter and/or the mixer according to the strength of the amplified radio frequency signal.