US 11,940,832 B2
Predicting a bandgap reference output voltage based on a model to trim a bandgap reference circuit
Matthias Rose, Helmond (NL); Maxim Kulesh, Hamburg (DE); and Neha Goel, Doraha (IN)
Assigned to NXP B.V., Eindhoven (NL)
Filed by NXP B.V., Eindhoven (NL)
Filed on Oct. 28, 2021, as Appl. No. 17/452,602.
Prior Publication US 2023/0139554 A1, May 4, 2023
Int. Cl. G05F 3/30 (2006.01)
CPC G05F 3/30 (2013.01) 20 Claims
OG exemplary drawing
 
1. A method comprising: determining a first error between a bandgap reference output voltage of a bandgap reference circuit at a first temperature and a target voltage; measuring a second temperature of the bandgap reference circuit; predicting the bandgap reference output voltage of the bandgap reference circuit at the second temperature and based on the first error; determining a second error between the predicted bandgap reference output voltage and the target voltage; determining a trim parameter of the bandgap reference circuit based on the second error; and setting the bandgap reference circuit with the trim parameter, wherein a third error between the bandgap reference output voltage of the bandgap reference with the trim parameter is less than the second error.