US 12,218,678 B2
Self calibration for an analog-to-digital converter
Vishnu Ravinuthula, Dallas, TX (US)
Assigned to TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed by TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed on Aug. 31, 2022, as Appl. No. 17/900,445.
Prior Publication US 2024/0072818 A1, Feb. 29, 2024
Int. Cl. H03M 1/10 (2006.01); H03M 1/00 (2006.01); H03M 1/06 (2006.01); H03M 1/16 (2006.01)
CPC H03M 1/1023 (2013.01) [H03M 1/001 (2013.01); H03M 1/06 (2013.01); H03M 1/1009 (2013.01); H03M 1/167 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method, comprising:
converting, by an analog-to-digital converter (ADC), a first input voltage to a first digital code, the first input voltage generated from a first reference voltage;
converting, by the ADC, a second input voltage to a second digital code, the second input voltage generated from a second reference voltage;
calculating a calibration factor based on the first digital code, the second digital code, the first reference voltage, and the second reference voltage;
converting, by the ADC, a third voltage to a third digital code; and
correcting the third digital code using the calibration factor.