An original low-noise ASIC preamplifier is under development for high-resolution gamma-ray spectroscopy with germanium or other semiconductor detectors. The preamplifier is being designed in a 0.35 μm 5V CMOS technology, uses no feedback resistor and incorporates original techniques to optimize its performance. The first novelty consists of a non-standard circuit structure for non-linear pole-zero compensation, aimed at removing the non-linear behaviour of the continuous non-resistive charge reset mechanism. The second consists of a controlled fast-reset feature aimed at greatly reducing the dead time caused by hits of high-energy charged particles. Such events are typical in nuclear physics experiments employing radioactive ion beams and in fusion-evaporation reactions which yield a prolonged saturation of the system that prevents detection of the subsequent decay events. The peculiar features of this preamplifier could be also exploited in other applications employing semiconductor detectors.
Design of a resistorless ASIC preamplifier for HPGe detectors with non-linear pole/zero cancellation and controlled fast-reset feature / A. Pullia, S. Capra - In: 2012 IEEE nuclear science symposium and medical imaging conference record : (NSS/MIC) : October 29-November 3, 2012 : Anaheim, California, USA / [a cura di] B. Yu. - Piscataway : IEEE, 2012. - ISBN 978-1-4673-2030-6. - pp. 86-90 (( convegno Nuclear science symposium and medical imaging conference tenutosi a Anaheim, CA, USA nel 2012 [10.1109/NSSMIC.2012.6551066].
Design of a resistorless ASIC preamplifier for HPGe detectors with non-linear pole/zero cancellation and controlled fast-reset feature
A. PulliaPrimo
;S. CapraUltimo
2012
Abstract
An original low-noise ASIC preamplifier is under development for high-resolution gamma-ray spectroscopy with germanium or other semiconductor detectors. The preamplifier is being designed in a 0.35 μm 5V CMOS technology, uses no feedback resistor and incorporates original techniques to optimize its performance. The first novelty consists of a non-standard circuit structure for non-linear pole-zero compensation, aimed at removing the non-linear behaviour of the continuous non-resistive charge reset mechanism. The second consists of a controlled fast-reset feature aimed at greatly reducing the dead time caused by hits of high-energy charged particles. Such events are typical in nuclear physics experiments employing radioactive ion beams and in fusion-evaporation reactions which yield a prolonged saturation of the system that prevents detection of the subsequent decay events. The peculiar features of this preamplifier could be also exploited in other applications employing semiconductor detectors.File | Dimensione | Formato | |
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Design of a resistorless ASIC preamplifier for HPGe detectors with non-linear pole_zero cancellation and controlled fast-reset feature.pdf
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