Time-to-digital converter and calibration method for performing time-to-digital conversion on input signal

Abstract

A time-to-digital converter and a calibration method for performing time-to-digital conversion on an input signal are provided. The time-to-digital converter includes a time counter, a calibration circuit and an adder. The time counter starts counting in response to a first edge of the input signal and stops counting in response to a second edge of the input signal, to generate a preliminary counting value. The calibration generates a first determination bit according to the first edge of the input signal and a first edge of a clock signal, generates a second determination bit according to the second edge of the input signal and a second edge of the clock signal, and generates a calibration value according to the first determination bit and the second determination bit. In addition, the adder adds the calibration value to the preliminary counting value to generate a final counting value.

Dependencies are inferred from the claim text.