Patent ID: 7826522
Filing Date: 2010-11-02
Classification: H04B

Abstract:
1. An integrated circuit comprising: a continuous-time equalizer (CTE) to receive an input from a lossy channel and to provide an output; and a calibration circuit coupled with the CTE, the calibration circuit including voltage reference generation circuitry_ to generate at least one reference voltage, wherein the calibration circuit is capable of calibrating a low-frequency gain of the CTE during a first interval of time and calibrating a high-frequency gain of the CTE during a second interval of time, wherein the first interval of time corresponds to a first calibration stage to lock a direct current (DC) voltage magnitude of the CTE to a first reference voltage, and the second interval of time corresponds to a second calibration stage to lock an alternating current (AC) voltage magnitude of the CTE to a second reference voltage, and further wherein a common mode voltage of the voltage reference generation circuitry tracks a common mode voltage of the CTE.