Systems and methods for multi-level termination calibration for voltage mode drivers

摘要

A voltage mode driver system includes a plurality of VMD cells, a plurality of auxiliary cells, a control logic and an output node. The plurality of VMD cells are configured to generate a first output. The plurality of VMD cells are configured to generate a calibrated effective resistance at different signal levels according to a calibration signal. The plurality of auxiliary cells are configured to generate a second output. The output node combines the first output and the second output into a driver output. The control logic is configured to control the plurality of auxiliary cells and the second output according to a selected level. The plurality of VMD cells may be configured to generate a calibrated effective resistance at different signal levels according to a calibration signal. A calibration component is configured to determine a voltage dependence effect and to generate a calibration signal according to the determined voltage dependence effect.

主权项

1. A voltage mode driver system comprising:
a plurality of VMD cells configured to generate a first output; a plurality of auxiliary cells configured to generate a second output; an output node to combine the first output and the second output into a driver output; a control logic configured to control the plurality of auxiliary cells and the second output according to a selected level; and a calibration component coupled to the plurality of VMD cells and the plurality of auxiliary cells and configured to generate VMD calibration code for the plurality of VMD cells according to a first termination resistance and to generate auxiliary calibration code for the plurality of auxiliary cells according to a second termination resistance.