A receiver circuit includes a first sampler and a second sampler. A clock-data-recovery circuit in the receiver circuit adjusts a sample time of the receiver circuit so that the sample time is proximate to a signal crossing point at an edge of an eye pattern associated with received signals. An offset-calibration circuit in the receiver circuit determines and adjusts an offset voltage of a given sampler, which can be the first sampler or the second sampler. This offset-calibration circuit may determine a present offset voltage of the given sampler in a timing region proximate to the signal crossing point in which the clock-data-recovery circuit dithers about a present sample time based on the present offset voltage. Additionally, the clock-data-recovery circuit and the offset-calibration circuit may iteratively converge on the signal crossing point and a residual offset voltage of the given sampler.
