Patent ID: 7266351

Claim:
A channel select filter of a Radio Frequency (RF) receiver of a wireless device, said channel select filter comprising: n filter stages connected in cascade, each of the n stages comprising: an in-phase signal path gain stage of an in-phase signal path operable to produce an in-phase amplified signal; a quadrature-phase signal path gain stage of a quadrature signal path operable to produce an quadrature-phase amplified signal; an in-phase signal path gyrator configured gain stage operable to produce an in-phase amplified and filtered output based upon the in-phase amplified signal and based upon a quadrature-phase amplified and filtered output; a quadrature-phase signal path gyrator configured gain stage operable to produce the quadrature-phase and filtered output based upon the quadrature-phase amplified signal and based upon the in-phase amplified and filtered output; and wherein each of the in-phase and quadrature-phase signal paths further includes a first impedance coupled to a first output of the corresponding gyrator, the first impedance comprising a resistance in parallel with a capacitance.