Device for measuring the rise-time of signals containing noise, arriving from gamma- or x-ray detectors

摘要

Signal (S1) from semiconductor photon detector is supplied to resistance and capacitance differentiating circuit (C11) which acts as a high pass filter to eliminate noise during measurement of rise time. A discriminator circuit (C21) with output (Vs) indicating rise time includes a comparator (k) which compares differentiator signal with a time displaced signal (S2) adapted to the parasitic noise at the detector.