公开(公告)号：US20240259029A1

公开(公告)日：2024-08-01

申请号：US18629230

申请日：2024-04-08

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Viswanathan NAGARAJAN ,  Aniket DATTA ,  Nithin GOPINATH

IPC: H03M1/10

CPC classification number: H03M1/1014

Abstract: An analog-to-digital converter (ADC) includes: a set of comparators configured to provide comparison results based on an analog signal and respective reference thresholds for comparators of the set of comparators; digitization circuitry configured to provide a digital output code based on the comparison results and a mapping; and calibration circuitry. The calibration circuitry is configured to: receive the comparison results; determine if the analog signal is proximate to one of the respective reference thresholds based on the comparison results; in response to determining the analog signal is proximate to one of the respective reference thresholds, receive ADC values based on different pseudorandom binary sequence (PRBS) values being applied to the analog signal; determine an offset error based on the ADC values; and provide a comparator input offset calibration signal at a calibration circuitry output if the estimated offset error is greater than an offset error threshold.

公开(公告)号：US20230387933A1

公开(公告)日：2023-11-30

申请号：US17828967

申请日：2022-05-31

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Viswanathan NAGARAJAN ,  Aniket DATTA ,  Nithin GOPINATH

IPC: H03M1/10

CPC classification number: H03M1/1014

Abstract: An analog-to-digital converter (ADC) includes: a set of comparators configured to provide comparison results based on an analog signal and respective reference thresholds for comparators of the set of comparators; digitization circuitry configured to provide a digital output code based on the comparison results and a mapping; and calibration circuitry. The calibration circuitry is configured to: receive the comparison results; determine if the analog signal is proximate to one of the respective reference thresholds based on the comparison results; in response to determining the analog signal is proximate to one of the respective reference thresholds, receive ADC values based on different pseudorandom binary sequence (PRBS) values being applied to the analog signal; determine an offset error based on the ADC values; and provide a comparator input offset calibration signal at a calibration circuitry output if the estimated offset error is greater than an offset error threshold.