Patent ID: 8301101

Claim:
A radio frequency (RF) receiver configured to receive and process an RF signal, the RF signal including a desired channel positioned within a particular frequency band, the RF receiver comprising: a low noise amplifier (LNA) coupled to the RF signal and configured to provide an amplified RF signal; and a frequency translated filter coupled between an input stage and a cascode stage of the LNA and configured to attenuate interferers in the RF signal outside the particular frequency band, the frequency translated filter comprising: a passive mixer configured to mix the RF signal received at a first mixer input and a local oscillator (LO) signal received at a second mixer input; and a baseband impedance coupled between an output of the passive mixer and ground, wherein the first mixer input presents a high-impedance path to ground for frequency components of the RF signal within the particular frequency band and a low-impedance path to ground for frequency components of the RF signal outside the particular frequency band.