Patent ID: 7013118

Claim:
A radio receiver formed in an integrated circuit, comprising: a low noise amplifier (LNA) coupled to receive an RF signal from an antenna, the LNA for generating an amplified RF signal; a mixer coupled to receive an output from the LNA, the mixer for down converting the amplified RF signal; filter circuitry coupled to receive a down converted output from the mixer, the filter circuitry further including: a differential amplifier having an input stage further including a pair of amplification MOSFETs coupled to receive an output from the mixer, the input stage for amplifying the down converted output received from the mixer; and a voltage follower output stage coupled to receive an amplified output from the input stage, the voltage follower circuitry for producing an output signal that matches the amplified output of the differential amplifier to drive a load wherein the voltage follower output stage further comprises two voltage follower circuits, each coupled to receive the amplified output from the differential amplifier input stage; wherein each of the two voltage follower circuits includes a pair of matched MOSFETs, each having a commonly coupled source terminal; and second and third current sinks coupled to the commonly coupled source terminals of the pair of matched MOSFETs of each of the two voltage follower circuits, respectively.