NDLI: Alternative circuit topologies for charge preamplifiers and pulse shapers

Content Provider	IEEE Xplore Digital Library
Author	Panjkovic, G.
Copyright Year	2013
Description	Author affiliation: Hydrix Pty Ltd., Carnegie, VIC, Australia (Panjkovic, G.)
Abstract	The circuits presented in this work are developed with motivation to improve dynamic performance of charge preamplifiers and pulse shapers used with solid state radiation detectors. Specifically, dynamic performance of a charge preamplifier is improved by introducing an active filter in its gain loop. In addition, benefits of a charge preamplifier that uses separate feedback loops for the capacitor and resistor are also discussed. Further, it is demonstrated that an active band-pass filter can be used for pulse shaping, instead of the conventional topology comprising a pole-zero compensation circuit and a low-pass filter. Finally, it is shown that a circuit with nested feedback loops has certain advantages as an alternative to the conventional charge preamplifier and pulse shaper combination. Under the same operating conditions, it is harder to drive this circuit into saturation than a typical charge preamplifier, which makes it more suitable for applications with high incident photon rates, where it also improves discrimination between successive photons. All circuits are purely analogue, which eliminates the need for additional protective measures which are unavoidable in the mixed mode circuits. The circuits are designed for implementations in the forms of discrete electronics modules or hybrids, however, the same concepts can also be used for implementations in ASICs.
Starting Page	1
Ending Page	6
File Size	391305
Page Count	6
File Format	PDF
e-ISBN	9781479905348
DOI	10.1109/NSSMIC.2013.6829774
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-10-27
Publisher Place	South Korea
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Band-pass filters Preamplifiers Feedback loop Resistors Photonics Capacitors Q-factor
Content Type	Text
Resource Type	Article

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