Patent ID: 8913655
Filing Date: 2014-12-16
Classification: H03K,H04L

Abstract:
1. A method for equalizing a data signal, comprising: generating n time-delayed versions of an input data signal; inputting m data signals to m feed-forward equalization (FFE) taps of a current-integrating summer circuit, wherein each of the m data signals corresponds to one of the n time-delayed versions of the input data signal; charging a capacitance to a precharge level during a reset period of the current-integrating summer circuit; generating an output current by each of the m FFE taps during an integration period of the current-integrating summer circuit, wherein the output currents from the m FFE taps collectively charge or discharge the capacitance during the integration period; and applying a gating control signal to at least one FFE tap of the m FFE taps during the integration period of the current-integrating summer circuit to disable the at least one FFE tap during a portion of the integration period in which the data signal input to the at least one FFE tap is invalid.