Patent ID: 11955984
Assignee: TEXAS INSTRUMENTS INCORPORATED
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. A method of operating an analog-to-digital converter (ADC), comprising:
obtaining, by the ADC, an analog signal;
comparing, by the ADC, the analog signal to respective reference thresholds of a set of comparators of the ADC to obtain comparison results;
determining if the analog signal is proximate to one of the respective reference thresholds based on the comparison results;
obtaining ADC values based on different pseudorandom binary sequence (PRBS) values being applied to the analog signal responsive to the analog signal being proximate to one of the respective reference thresholds;
determining an offset error based on the ADC values; and
providing a comparator input offset calibration signal to calibrate at least one comparator of the set of comparators responsive to the estimated offset error being greater than an offset error threshold.