Multiplex pulse shape discriminator based on CPLD

This paper carries out the digital design for the pulse shape discriminator, which integrates six inputs' discrimination and processes them separately in CPLD, based on the front-rear-edge theory. A new method using high frequency pulse is adopted to measure the signal's width. The traditional unilateral threshold is replaced by the window threshold in signal discrimination, which solves the module's design difficulty in extra-large-signal processing, and thus the rate of error-trigger and error-discrimination is much reduced. This design has been applied successfully in HXMT's electronic system. (authors)