Pulse width detection circuit, distance measurement circuit, detection method and distance measurement method

The invention relates to the field of laser radar circuits, in particular to a pulse width detection circuit. The pulse width detection circuit comprises an in-phase comparator, an anti-phase comparator and a TDC timer, the in-phase comparator and the anti-phase comparator are connected with the TDC timer, and the in-phase comparator and the anti-phase comparator are used for receiving pulse signals and threshold values, comparing the pulse signals with the threshold values and outputting signals according to comparison results. The TDC timer is used for recording the moment when the signals are outputted. The in-phase comparator and the anti-phase comparator are adopted to receive pulse signals and threshold values and compare the pulse signals with the threshold values, the signals are outputted, the TDC timer records the signal output moment, the pulse width is calculated according to the two moments, the echo pulse peak value is detected through the pulse width, measurement of thepulse width is not limite