Method and apparatus to compensate for nonlinear echo in an output of a current source

摘要

A compensator generating a compensation signal to compensate for nonlinear echo in an output of a current source. The nonlinear echo is a result of transitioning the current source between an ON state and an OFF state. The compensator includes driving, weighting, function, and compensating circuits. The driving circuit receives a first signal that is based on the output of the current source. The weighting circuit is configured to generate a second signal based on weighted versions of the first signal. The function circuit, based on the second signal, (i) updates each of multiple functions, and (ii) selects a first function. The driving circuit generates a driving signal based on the first function selected by the function circuit. The compensating circuit generates the compensation signal based on the driving signal to compensate for the nonlinear echo provided by the output of the current source.

主权项

1. A compensator configured to generate a first compensation signal to compensate for nonlinear echo in an output of a current source, wherein the nonlinear echo is a result of transitioning the current source between an ON state and an OFF state, the compensator comprising:
a driving circuit configured to receive a first signal that is based on the output of the current source, wherein the first signal comprises the nonlinear echo; a weighting circuit configured to generate a second signal based on weighted versions of the first signal; a function circuit configured to, based on the second signal, (i) update each of two functions, and (ii) select a first function of the two updated functions, wherein the driving circuit is configured to generate a driving signal based on the first function selected by the function circuit; and a compensating circuit configured to generate the first compensation signal based on the driving signal to compensate for the nonlinear echo provided by the output of the current source.