| 摘要 |
A time-to-digital converting circuit is provided to minimize influence of peripheral noise without an analog circuit by generating digital data according to changed delay time after changing the delay time of a sensing signal according to intensity of an external stimulus. A time-to-digital converting circuit includes a delay variable unit(30), and a delay calculating and data generating unit(40). The delay variable unit(30) generates a reference signal(ref) having a fixed delay and a sensing signal(sen) having a delay variable according to an impedance value of an external signal. The delay calculating and data generating unit(40) calculates a delay difference between the reference signal(ref) and the sensing signal(sen), and generates digital data having a value corresponding to the calculated delay difference.
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