Serial Link Receiver with Improved Bandwidth and Accurate Eye Monitor

A receiver comprising:

• a summing preamp circuit including a first preamp converting an input correction signal and having nonlinear characteristics;
• a decision circuit having an input that is coupled to an output of the summing preamp circuit;
• circuitry to drive a set of test voltages to an input of the summing preamp circuit;
• circuitry to determine a plurality of preamp codes for the input correction signal that correspond to the test voltages based on an output of the decision circuit;
• and
• circuitry to generate a nonlinear preamp code mapping based on the plurality of preamp codes, the nonlinear preamp code mapping correcting for the nonlinear characteristics of the first preamp.

A method comprising:

• driving a summing circuit with a set of test voltages, a preamp of the summing circuit converting an input correction signal and having nonlinear characteristics, an output of the summing circuit coupled to an input of a decision circuit;
• determining a plurality of preamp codes corresponding to the test voltages based on an output of the decision circuit;
• and
• generating a nonlinear preamp code mapping for the input correction signal based on the plurality of preamp codes, the nonlinear preamp code mapping correcting for the nonlinear characteristics of the preamp.