A. Baschirotto et al., RADIATION-DAMAGE INVESTIGATION FOR THE DESIGN OF A HARDENED FAST BIPOLAR MONOLITHIC CHARGE SENSITIVE PREAMPLIFIER, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 362(2-3), 1995, pp. 466-471
In order to implement a high-speed, radiation hardened, charge sensiti
ve preamplifier (CSP) in the monolithic 2 mu m BiCMOS technology (call
ed HF2CMOS), the performance of the available NPN and PNP transistors
were measured, before and after neutron irradiation. Furthermore, also
monolithic CSPs, realized with the same technology, were irradiated a
nd investigated. Results on the neutron irradiation effect on the base
spreading resistance(r(bb')) of the CSP input NPN-transistor are pres
ented. Design strategies, to reduce the radiation damage effects in th
e CSP performance, were studied. Results confirm that the HF2CMOS proc
ess is suitable to sustain the radiation environment of the future LHC
collider. A design for a new CSP version is proposed. A novel method
for measuring the series noise of the CSP, at large input capacitances
, was used. The method minimized the errors caused by the CSP rise-tim
e.