Low-power low-noise BJT amplifier for nuclear applications
- Politecnico di Milano (Italy)
This work present an analysis of the peculiar characteristics of the front-end electronics for radiation detectors employing bipolar transistors, taking into account the noise, speed and power-dissipation constraints. It is shown that, in a first approximation, the optimum processing time is inversely proportional to the dissipated power P{sub d} of the front-end stage, while the optimum noise performance can be made almost independent on P{sub d}. The noise characteristics of a bipolar transistor having a maximum cut-off frequency of 8 GHz have been experimentally determined, and discussed in relation with the low-power requirements. A prototype of charge amplifier operated with a single power supply of 3 Volt and a dissipation of 600 {mu}W has been tested and showed a ENC = 470 electrons r.m.s. at 10 ns RC-CR shaping and with a total input capacitance of 6 pF.
- OSTI ID:
- 513024
- Report Number(s):
- CONF-961123--
- Country of Publication:
- United States
- Language:
- English
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