US 12,031,873 B2
Process and mismatch insensitive temperature sensor
Peh Sheng Jue, Singapore (SG); and Jeffrey L. Sonntag, Weaverville, NC (US)
Assigned to Silicon Laboratories Inc., Austin, TX (US)
Filed by Silicon Laboratories Inc., Austin, TX (US)
Filed on Oct. 19, 2021, as Appl. No. 17/504,760.
Prior Publication US 2023/0121535 A1, Apr. 20, 2023
Int. Cl. G01K 7/00 (2006.01); H03H 7/06 (2006.01); H03F 3/45 (2006.01)
CPC G01K 7/00 (2013.01) [H03H 7/06 (2013.01); H03F 3/45475 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A temperature sensor comprising:
a proportional to absolute temperature (PTAT) voltage generator, to generate a reference voltage during an auto-zero stage and a plurality of sampling voltages during a sampling stage, wherein a difference between the reference voltage and each of the plurality of sampling voltages is defined as a ΔV voltage;
a sampling and gain boosting circuit to amplify a plurality of ΔV voltages; and
a filter to average the plurality of ΔV voltages.