Patent ID: 7539244

Claim:
A receiver comprising a filter capable of receiving an input signal and generating an output signal, the filter providing a transfer function, the filter comprising: a first stage capable of adjusting a pole and a first zero of the transfer function; a second stage capable of adjusting a second zero of the transfer function; and a third stage capable of adjusting a third zero of the transfer function wherein at least one of the second stage and the third stage comprises: a first resistor and a first capacitor coupled to a first input of the stage; and a second resistor and a second capacitor coupled to a second input of the stage; wherein the first resistor is an adjustable resistor and the second or third zero is based on a resistance of the first resistor, wherein at least one of the second stage and the third stage further comprises a gain circuit capable of preventing adjustments to the first resistor from altering a gain of the stage.