Reduced power SERDES receiver using selective adaptation of equalizer parameters in response to supply voltage and operating temperature variations and technique for measuring same

A method of controlling the adaptation of a receiver having an analog equalizer filtering a received signal to produce a filtered analog signal, the method comprising:

• a) adapting parameters of the analog equalizer to the received signal;
• b) suspending the adaptation of the analog equalizer parameters once the parameters have converged or a time period has expired;
• c) while the adaption of the analog equalizer parameters are suspended:
• d) generating a first error signal in response to the filtered analog signal;
• e) adapting a first and second monitor coefficients in response to the first error signal;
• f) generating metrics from the first and second monitor coefficients;
• and
• g) comparing the metrics to corresponding threshold values and, if any of the metrics exceed the corresponding threshold value, then repeating steps a)-g), otherwise repeating steps d)-g).

A method of controlling the adaptation of a receiver having at least one equalizer responsive to a received signal to produce a corrected signal, the method comprising:

• a) adapting parameters of the equalizer to the received signal;
• b) suspending the adaptation of the equalizer parameters once the parameters have converged or a time period has expired;
• c) while the adaption of the equalizer parameters are suspended:
• d) monitoring the corrected signal to measure changes in the corrected signal due to power supply and operating temperature changes;
• e) comparing the measured changes in the corrected signal to corresponding threshold values and, if any of the measured changes exceed the corresponding threshold value, then repeating steps a)-e), otherwise repeating steps d)-e).