US 12,442,695 B2
Temperature sensing device
Wei-Fan Chen, Taichung (TW); and Kuo-Chi Tsai, Taoyuan (TW)
Assigned to LEAP Semiconductor Corp., Taoyuan (TW)
Filed by LEAP Semiconductor Corp., Taoyuan (TW)
Filed on Nov. 2, 2022, as Appl. No. 17/979,743.
Claims priority of application No. 111136365 (TW), filed on Sep. 26, 2022.
Prior Publication US 2024/0102869 A1, Mar. 28, 2024
Int. Cl. G01K 7/18 (2006.01); H01C 10/16 (2006.01); H01C 13/02 (2006.01)
CPC G01K 7/18 (2013.01) [H01C 10/16 (2013.01); H01C 13/02 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A temperature sensing device comprising:
a resistor string comprising a variable resistor, a first resistor, and a second resistor which are coupled in series with each other, wherein the resistor string is coupled between a sensing end and a reference ground voltage, and the first resistor and the second resistor are coupled to a monitoring end to provide a monitoring voltage; and
a control circuitry which is coupled to the resistor string, receives the monitoring voltage, generates sensing temperature information by comparing the monitoring voltage with a plurality of reference voltages, and generates adjustment information according to the sensing temperature information,
wherein the control circuitry adjusts a resistance provided by the variable resistor according to the adjustment information, the first resistor is a polysilicon resistor, and the second resistor is a silicon carbide diffusion resistor,
wherein the variable resistor comprises:
N first fuses, N being a positive integer; and
N third resistors respectively forming a plurality of fuse-resistor strings with the first fuses, wherein the fuse-resistor strings are coupled in parallel with each other,
wherein the control circuitry determines whether to blow at least one of the first fuses according to the adjustment information to adjust the resistance provided by the variable resistor.