Patent ID: 8721174

Claim:
A temperature sensing system for supporting a single-point calibration, comprising: a temperature-sensitive pulse generator for generating a mask clock signal with a mask width varying as the test temperature changes, the temperature-sensitive pulse generator adjusting the mask width according to a calibration parameter; a time-to-digital converter electrically coupled to the temperature-sensitive pulse generator for receiving the mask clock signal directly from the temperature-sensitive pulse generator, and converting the mask width of the mask clock signal into a digital output of the temperature sensing system representing a temperature level of the test temperature; and a calibration circuit electrically coupled to the temperature-sensitive pulse generator and the time-to-digital converter, the calibration circuit used for making a comparison between the digital output of the time-to-digital converter and a predetermined calibration value under a specific calibration temperature and for generating the calibration parameter provided for the temperature-sensitive pulse generator according to the comparison result; wherein the temperature-sensitive pulse generator uses the calibration parameter generated by the calibration circuit a single time to adjust the mask width of the mask clock signal when the specific calibration temperature is applied; and wherein the single adjustment of the mask width of the mask clock signal results in calibration of the temperature-sensitive pulse generator such that the temperature-sensitive pulse generator generates all subsequent mask clock signals in a manner reflecting such calibration.