Fully differential readout electronics for coplanar-grid detectors

James E Toney; Christopher M Baer; Nader Kalkhoran

doi:10.1117/12.504882

20 January 2004 Fully differential readout electronics for coplanar-grid detectors

James E Toney, Christopher M Baer, Nader Kalkhoran

Proceedings Volume 5198, Hard X-Ray and Gamma-Ray Detector Physics V; (2004) https://doi.org/10.1117/12.504882
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

We have demonstrated a new amplifier topology for coplanar-grid detectors that provides true differential readout with a single, fully-differential, charge-sensitive preamplifier. A prototype, multi-detector system with adjustable gain for each detector has been demonstrated using this fully differential approach. In its initial implementation using general-purpose amplifier chips, this system produces comparable noise performance to the traditional two-amplifier readout with specialized, charge-sensitive preamplifiers. In lieu of a differential gain to correct for electron trapping, the circuit uses a differential sampling scheme. This method enables a symmetrical photopeak to be obtained, but introduces some undesired filtering that limits energy resolution.

Citation Download Citation

James E Toney, Christopher M Baer, and Nader Kalkhoran "Fully differential readout electronics for coplanar-grid detectors", Proc. SPIE 5198, Hard X-Ray and Gamma-Ray Detector Physics V, (20 January 2004); https://doi.org/10.1117/12.504882

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