Patent ID: 9634156
Date: 2017-04-25
CPC Classifications: G01J,H01L

Claim:
1. A semiconductor photomultiplier device comprising: a plurality of photosensitive cells each having a photo-detector, a quench resistive load and a first stage capacitor, each first stage capacitor being operably coupled to a node common to the photo-detector and the quench resistive load of the corresponding photosensitive cell, the device being arranged in a three electrode connection configuration comprising first and second electrodes arranged to operably provide a biasing of the device and a third electrode arranged to provide an output signal from the photosensitive cells, and a plurality of second stage capacitors, whereby each second stage capacitor is operably coupled to the third electrode and to a discrete group of two or more first stage capacitors, wherein a two-stage capacitive coupling of a plurality of the first stage capacitors and a corresponding one of the second stage capacitors decreases pulse response duration of the output signal of the third electrode by a predetermined factor when compared to an output signal from the third electrode via a single stage capacitive coupling consisting of the plurality of first stage capacitors but without a corresponding second stage capacitor.