US 12,436,045 B2
High accuracy on-chip temperature sensor system and method thereof
Gireesh Rajendran, Bengaluru (IN); and G. Ranjithkumar, Bengaluru (IN)
Filed by Steradian Semiconductors Private Limited, Bengaluru (IN)
Filed on Jul. 1, 2022, as Appl. No. 17/855,813.
Claims priority of application No. 202241014929 (IN), filed on Mar. 17, 2022.
Prior Publication US 2023/0296451 A1, Sep. 21, 2023
Int. Cl. G01K 15/00 (2006.01); G01K 1/02 (2021.01); G01K 7/00 (2006.01)
CPC G01K 15/005 (2013.01) [G01K 1/026 (2013.01); G01K 7/00 (2013.01); G01K 2219/00 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A temperature sensor in a chip for determining a temperature of the chip comprising:
a first temperature sensor with a first characteristic, wherein the first characteristic is representing a first relation between temperature versus the electric signal strength generated by the first temperature sensor;
a second temperature sensor with a second characteristic, wherein the second characteristic is representing a second relation between temperature versus electric signal strength generated by the second temperature sensor, first characteristic being different from the second characteristic;
a processor operative to determine temperature of the chip is configured to determine a first parameter and a second parameter in the calibration mode and determining the chip temperature using the first parameter and the second parameter in a real time operating mode,
wherein, the first parameter is a relative slope “S” represented as S=(T2−T1)/(R2−R1), in that, R1=V1/V2 and R2=V3/V4, in that V1 and V2 are electric signal strength in terms of voltages provided by first temperature sensor and the second temperature sensor respectively when the chip is subjected to the first temperature and V3 and V4 are electric signal strength in terms of voltages provided by first temperature sensor and the second temperature sensor respectively when the chip is subjected to the second and the second parameter is at least based on first parameter.