The analog backend for radiation detector with pulsed outputs. The pulses are expected to carry information about energy and the type of particle interacting with the detector. The detectors could be semiconductor diodes or scintillators with semiconductor photomultipliers.
Examples of detectors that could be connected to the PCRD07 analog-backend.
The circuit can operate in multiple modes. The operation mode depends on the logic used to control the circuit.
The signal output from the scintillation detector is pulsed. The pulses are stored in a specially developed sample-hold circuit that behaves as a signal follower and analog memory. When signal #PeakDetect_Trace is in H an analog switch U5 turns on and a signal at an output U2 follows a signal at the input with a slight delay which is done by R13 and C19. If signal #PeakDetect_Trace is switched to a high impedance state the analog switch U5 starts to be controlled by a comparator U1. In this case, when the input signal goes from high to low, a positive input of the comparator will be at a higher voltage than a negative input, following a voltage at capacitor C19.