A422A

The CAEN Mod. A422A is a charge sensitive preamplifier, designed to be used especially with semiconductor detectors and in particular whenever the charge division is required (as in position sensitive silicon detectors). The unit accepts both positive and negative input pulses. A Test input for detector gain calibration and a HV input (up to 5 kV) for the detector bias are also included.

The output is an inverting unipolar voltage pulse, proportional in amplitude to the integrated charge; decay time is 300 µs. A Timing output provides an unipolar inverting fast voltage pulse, with a 15 ns typical rise time, across a 50 Ω load. Three different sensitivities (5, 30 or 60 mV/MeV) can be selected.