US 11,668,612 B2
Apparatus, system, and method for trimming analog temperature sensors
Venkata Nittala, Bangalore (IN); Sridhar Yadala, Bengaluru (IN); and Sivakumar Grandhi, Bangalore (IN)
Assigned to SanDisk Technologies LLC, Addison, TX (US)
Filed by SanDisk Technologies LLC, Addison, TX (US)
Filed on Jun. 18, 2020, as Appl. No. 16/905,711.
Prior Publication US 2021/0396604 A1, Dec. 23, 2021
Int. Cl. G01K 15/00 (2006.01); G11C 29/02 (2006.01); G01K 7/00 (2006.01); G11C 8/10 (2006.01); G11C 7/00 (2006.01); G11C 29/04 (2006.01); G11C 7/04 (2006.01); G11C 29/16 (2006.01); G11C 29/50 (2006.01); G11C 29/06 (2006.01)
CPC G01K 15/007 (2013.01) [G01K 7/00 (2013.01); G01K 15/005 (2013.01); G11C 29/028 (2013.01); G11C 7/00 (2013.01); G11C 7/04 (2013.01); G11C 8/10 (2013.01); G11C 29/06 (2013.01); G11C 29/16 (2013.01); G11C 2029/0403 (2013.01); G11C 2029/5002 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method, comprising:
raising a temperature of a temperature sensor to a highest temperature of a qualification temperature range having a lowest temperature and the highest temperature;
trimming the temperature sensor such that a high temperature code generated by the temperature sensor represents an actual temperature of the temperature sensor at the highest temperature;
lowering the temperature of the temperature sensor to the lowest temperature;
determining a slope error between the high temperature code and a low temperature code generated by the temperature sensor having the lowest temperature, wherein the slope error is determined with respect to a difference between a highest temperature slope and a lowest temperature slope; and
determining a correction function that compensates for the slope error of each measured temperature code generated by the temperature sensor for temperatures across the qualification temperature range.