Efficient noise canceling circuit for receivers

摘要

The disclosed embodiments provide a system that tracks and compensates for input signal noise at a receiver of a data communication channel. In particular embodiments, the receiver of the data communication link receives an input signal which comprises two signal levels. Next, for each of the two signal levels, the system generates an error signal by comparing the input signal value of the signal level with an expected signal value for the signal level. The system then updates a threshold signal value based on at least one of the two error signals associated with the two signal levels. Finally, the system compensates for input signal noise in the received input signal using the updated threshold signal value.

主权项

1. A method for tracking and compensating for an input signal noise in a receiver, comprising:
receiving an input signal comprising two signal levels associated with two different expected values; for each of the two signal levels, generating an error signal by comparing the input signal value of the signal level with an expected signal value associated with the signal level; updating the expected values associated with the two signal levels based on the generated error signals; generating a threshold signal value based on two updated expected values associated with the two signal levels; receiving, at the receiver, the threshold signal value; and outputting, by the receiver, a digital signal based on the input signal and the threshold signal value, wherein the receiver compensates for the input signal noise in the received input signal using the threshold signal value.