Method and apparatus for digitizing scintillation pulses

摘要

A method for digitalizing a scintillation pulse, comprising: setting n threshold voltages V_th according to the features of a scintillation pulse; forming a voltage comparison unit by n low voltage differential signal reception ports, and when a pulse to be sampled goes over any one threshold, the voltage comparison unit outputting a state jump and a threshold voltage corresponding to the state jump; and performing digital sampling at the time of the state jump using a time-to-digital converter; and at the same time, identifying the threshold voltage corresponding to the state jump, and acquiring a scintillation pulse voltage-time pair to complete the digitalization of the scintillation pulse. A device for digitalizing a scintillation pulse, comprising a scintillation pulse conversion unit, a threshold comparison unit, a time digitalization unit and a data processing and transmitting unit. The present invention realizes threshold comparison using a digital differential interface in a field programmable gate array and acquires a voltage-time pair of a scintillation pulse, so as to realize digitalization of the scintillation pulse, greatly simplify the system structure, improve the integration level of the system, and reduce the power consumption of the system.