NJFET-PMOS PREAMPLIFIER SYSTEM - AN UPGRADED VERSION

The NJFET-PMOS monolithic preamplifier system JAMEX64 is now available in three versions: they differ in the power consumption and in the minimum gate length of the NJFETs. The most recent version employs short channel NJFETs (L = 1.6-mu-m), to open-up the possibility of extending the range of application of the system to accelerators of bunch-crossing in the 100 ns range. The paper describes the weighting function associated with the JAMEX64 analog channels and compares the results of the theoretical noise analysis with the experimental measurements of the equivalent noise charge.