Patent ID: 8442464

Claim:
A receiver circuit, comprising: a plurality of amplifying transistors connected in series, the amplifying transistors effective to amplify an input signal; a plurality of control transistors, wherein each of the plurality of control transistors is connected to one of the plurality of amplifying transistors, wherein each control transistor is effective to receive an independent control signal at a gate of the control transistor and effective to output to one of the amplifying transistors so as to provide for independent operation of each of the plurality of amplifying transistors, and wherein a number of the plurality of amplifying transistors in operation corresponds to a transistor width of the receiver circuit; and a bias generation circuit that includes circuitry effective to mimic operation of the plurality of amplifying transistors and the plurality of control transistors, the bias generation circuit includes a first set of transistors with gates and effective to receive the independent control signals at respective gates and a second set of transistors effective to receive an RF reference bias current input and the bias generation circuit effective to output an RF bias control voltage to the plurality of amplifying transistors, the RF bias control voltage corresponding to a value of the transistor width, the first set of transistors being equal in number to the control transistors; and wherein the independent control signals and the RF reference bias current input are independently tunable.