A LOW-POWER DISSIPATION FRONT-END READOUT FOR SPACE INSTRUMENTATION

We present a first prototype realized for the readout of a straw tube for space application, made in a monolithic Bi-CMOS process. The circu it system consists of a charge sensitive preamplifier followed by an R C-CR shaping filter of 20 nsec peaking time. The charge preamplifier, which has an NPN bipolar input transistor, is able to feature about 20 00 el(RMS) of Equivalent Noise Charge with a power dissipation of abou t 3.5 mW. The shaping filter circuit proposed and prototyped is well w orking and has shown to fulfill the required specifications.