US 12,261,617 B2
Internally calibrated analog-to-digital converter
Daniel Henrik Saari, Gloucester (CA)
Assigned to Analog Devices International Unlimited Company, Limerick (IE)
Filed by Analog Devices International Unlimited Company, Limerick (IE)
Filed on Nov. 29, 2022, as Appl. No. 18/059,805.
Prior Publication US 2024/0178851 A1, May 30, 2024
Int. Cl. H03M 1/10 (2006.01)
CPC H03M 1/1014 (2013.01) 20 Claims
OG exemplary drawing
 
1. A method for operating an analog-to-digital converter (ADC) system, the method comprising:
receiving a measured first reference value corresponding to a first internal reference voltage of the ADC system measured by an external voltage measurement device;
receiving a measured second reference value corresponding to a second internal reference voltage of the ADC system measured by the external voltage measurement device;
applying the first internal reference voltage to an input of an internal ADC to generate a resulting first calibration value;
applying the second internal reference voltage to the input of the internal ADC to generate a resulting second calibration value;
measuring a signal value of an analog signal of interest applied to the input of the internal ADC; and
providing a corrected value, corresponding to the measured signal value, using the first reference value, the second reference value, the first calibration value, the second calibration value, and the measured signal value.