Patent ID: 7218687

Claim:
A receiver with baseline wander correction, for correcting a received input signal taken from a coupling transformer to output an output signal of baseline wander correction, comprising: a first and a second input terminal receiving a first and a second signals of the received input signal, respectively; a comparator receiving the first and the second signals of the received input signal, and comparing the first and the second signals of the received input signal to produce a control signal; comparison logic receiving the first and the second signals of the received input signal, and generating the output signal of baseline wander correction in accordance with the first and the second signals of the received input signal; and compensation control circuitry receiving the control signal and the output signal, producing a compensation signal in accordance with the control and the output signals, and providing the compensation signal to the input terminals to correct respective DC values of the first and the second signals of the received input signal, wherein the compensation control circuitry comprises: an integrator, responsive to the control and the output signals, generating a compensation voltage; and a voltage-to-current converter, producing the compensation signal in accordance with the compensation voltage, and wherein the integrator comprises: a capacitor for producing the compensation voltage; a first switch, responsive to the output signal, for allowing the capacitor to be charged and discharged; a first current source providing the capacitor with the charge current; a second current source providing the capacitor with the discharge current; a second switch, responsive to the control signal, made conductive to charge the capacitor through the first switch when the control signal is at a first state; and a third switch, responsive to the control signal, made conductive to discharge the capacitor through the first switch when the control signal is at a second state.