Patent ID: 8494473

Claim:
Circuitry for use in a radio frequency receiver for processing a radio frequency signal, the circuitry comprising: a mixer arranged to: receive the radio frequency signal wherein the received radio frequency signal has an interference component; and down-convert the received radio frequency signal to a lower frequency, wherein the interference component in the down-converted signal is within an interference frequency range; output a differential output signal on two output lines; and an LC based notch filter comprising a capacitor, an inductor and a second capacitor arranged in series connecting together the two output lines, arranged to: receive the down-converted signal from the mixer; filter the down-converted signal, wherein the LC based notch filter has a notch centered within said interference frequency range, such that the LC based notch filter is arranged to attenuate the interference component in the down-converted signal; and output the filtered signal for processing by a baseband processing block.