Abstract: A signal calibration circuit and a signal calibration method are provided. The signal calibration circuit includes: an analog-to-digital conversion circuit, coupled to an output terminal of the circuit to be tested, obtaining an analog signal output by the circuit to be tested and transforming the analog signal into a digital signal; a calibration signal generation circuit, generating a calibration signal, modifying the calibration signal according to a first signal, and outputting a modified calibration signal; and a calibration circuit, coupled to the analog-to-digital conversion circuit and the calibration signal generation circuit, obtaining the digital signal and the calibration signal, calibrating the digital signal according to the modified calibration signal and outputting a calibrated digital signal. The first signal is a predetermined signal or the calibrated digital signal output by the calibration circuit.

Abstract: A signal calibration circuit and a signal calibration method are provided. The signal calibration circuit includes: an analog-to-digital conversion circuit, coupled to an output terminal of the circuit to be tested, obtaining an analog signal output by the circuit to be tested and transforming the analog signal into a digital signal; a calibration signal generation circuit, generating a calibration signal, modifying the calibration signal according to a first signal, and outputting a modified calibration signal; and a calibration circuit, coupled to the analog-to-digital conversion circuit and the calibration signal generation circuit, obtaining the digital signal and the calibration signal, calibrating the digital signal according to the modified calibration signal and outputting a calibrated digital signal. The first signal is a predetermined signal or the calibrated digital signal output by the calibration circuit.

Abstract: A signal self-calibration circuit and a signal self-calibration method are provided. The signal self-calibration circuit includes a comparator, a switcher, and an output-stage circuit. The comparator has a non-inverting input terminal and an inverting input terminal. An input signal and a reference signal are alternately input to the non-inverting input terminal and the inverting input terminal of the comparator. The switcher switches the input signal and the reference signal which are input to the non-inverting input terminal and the inverting input terminal of the comparator when a rising edge occurs at an output signal of the comparator. The output-stage circuit generates a square-wave signal with a duty ratio of 50% according to the output signal of the comparator.