Patent ID: 6285960
Filing Date: 2001-09-04
Classification: H03M,H04L

Abstract:
A method for calibrating a line card having a gain control circuit, an adjustment control circuit, a comparator, and memory device, the gain control circuit being configured to receive an input signal and an adjustment signal and to output an adjusted output signal that is based on the input signal and the adjustment signal, the comparator being configured to compare the input signal to a nominal amplitude value and to output a comparison signal that indicates whether the input signal requires an adjustment, the adjustment control circuit being configured to alter the adjustment signal to a nominal adjustment value so that an adjusted amplitude value of the adjusted signal converges with the nominal amplitude value when the comparison signal indicates that the input signal requires adjustment, the method comprising the acts of:providing a first input signal and a first adjustment signal to the gain control circuit so that the gain control circuit outputs an adjusted output signal;providing a nominal amplitude value to the comparator so that the comparator outputs a first comparison signal that indicates whether the first input signal requires an adjustment;determining a first nominal adjustment value based on the first comparison signal; andsubstantially permanently storing the first nominal adjustment value within a first address of the memory device, the first address being associated with the first input signal.