The analysis of the time information is an important technique in nuclear electronics, a lot information of nuclear events is stored in the output of nuclear radiation detectors as timing information. The timing circuit is the basic unit of conventional analog circuit in nuclear timing detectors, which consists of leading-edge timing, zero-crossing timing, constant-fraction discriminator (CFD) and ARC timing on a regular timing circuit. Compared with analog timing circuits, the digital timing circuit has many advantages. The first is the front end of the input signal which is digitalized and s...