Temperature sensor and temperature sensing method

摘要

Provided is a temperature sensing circuit and a temperature sensing method including a delay unit delaying an input clock signal to generate a feedback clock signal, and including logic gates of which delay times are variable according to temperature, a delay control unit comparing the feedback clock signal with a reference clock signal and controlling each of the logic gates of the delay unit according to the comparison result, and an input signal control unit selecting, as the input clock signal, any one of the feedback clock signal and the reference clock signal to input the input clock signal to the delay unit.

主权项

1. A temperature sensing circuit comprising:
a delay unit configured to delay an input clock signal to generate a feedback clock signal, the delay unit including logic gates; a delay control unit configured to control each of the logic gates of the delay unit by comparing the feedback clock signal with a reference clock signal; and an input signal control unit configured to select, as the input clock signal, one of the feedback clock signal and the reference clock signal to input to the delay unit, based on a number of circulation cycles of the input clock signal.