CIRCUIT AND METHOD FOR PERFORMING ADAPTION ON ALL RECEIVER BRANCHES

摘要

Receiver circuitry is disclosed that can take circuit branches offline to possibly adapt an offset value. In one embodiment, a circuit in a receiver has at least two branches. Each branch includes an adjustor to adjust the branch signal by an offset value. Selection circuitry takes one of the branches offline by selecting the output of that branch as an offline value, and by selecting the output of one or more of the other branches as a data decision value. The selection circuitry changes which branch is taken offline during the operation of the circuit. When a branch is taken offline, an offset value associated with that branch may be updated, if necessary.

主权项

1. A receiver comprising:
a plurality of branches, each one of the plurality of branches to receive the same input signal, and each one of the plurality of branches including:
an adjustor to adjust an input of the adjustor by an offset; anddecision circuitry downstream from the adjustor to convert an input of the decision circuitry to one of two possible output values; wherein the offset associated with at least one of the plurality of branches is selectable from a finite number of values, and the offset selected is to change during an operation of the receiver; the receiver further comprising selection circuitry coupled to an output of each of the plurality of branches, the selection circuitry to select the output of one of the plurality of branches as an offline value and to select the output of one or more other of the plurality of branches as a data decision value; and the receiver further to change which output of the plurality of branches is selected as the offline value during the operation of the receiver such that each one of the plurality of branches has an output selected as the offline value at a respective different point in time during the operation of the receiver; the branch having the output selected as the offline value is an offline error computation branch, and the receiver further comprising comparison circuitry to compare the offset associated with the offline error computation branch to at least the data decision value to determine whether the offline value is erroneous.