Automatic pole-zero/zero-pole digital compensator for high-resolution spectroscopy: Design and experiments
Abstract
In a high-resolution spectroscopy system the relatively long exponential decay due to the charge preamplifier is customarily canceled in an analogue fashion by means of a PZ (Pole-Zero) stage. The accurateness of such a compensation has a big impact on the energy resolution because it strongly affects the baseline-stability problems. The authors have automatically and on-line performed such a compensation in a digital way, while maintaining a spectroscopy performance and keeping at minimum both the ADC sampling frequency (thus power consumption) and its resolution (thus cost). This is done through an IIR filter, implemented within a FPGA by a DSP. The so-compensated waveform has, in excellent approximation, an all-pole shape. Starting from such a signal, the minimum-noise filters for energy and/or time measurements are then promptly synthesized and implemented for real time operation through the same DSP.
- Authors:
-
- Politecnico di Milano (Italy). Dipt. di Elettronica e Informazione
- Publication Date:
- OSTI Identifier:
- 684538
- Report Number(s):
- CONF-981110-
Journal ID: IETNAE; ISSN 0018-9499; TRN: 99:010065
- Resource Type:
- Journal Article
- Journal Name:
- IEEE Transactions on Nuclear Science
- Additional Journal Information:
- Journal Volume: 46; Journal Issue: 4Pt1; Conference: 1998 IEEE nuclear science symposium and medical imaging conference, Toronto (Canada), 10-12 Nov 1998; Other Information: PBD: Aug 1999
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; SPECTROMETERS; ENERGY RESOLUTION; ANALOG-TO-DIGITAL CONVERTERS; LOGIC CIRCUITS; PULSE SHAPERS; DESIGN
Citation Formats
Geraci, A, Pullia, A, and Ripamonti, G. Automatic pole-zero/zero-pole digital compensator for high-resolution spectroscopy: Design and experiments. United States: N. p., 1999.
Web. doi:10.1109/23.790684.
Geraci, A, Pullia, A, & Ripamonti, G. Automatic pole-zero/zero-pole digital compensator for high-resolution spectroscopy: Design and experiments. United States. https://doi.org/10.1109/23.790684
Geraci, A, Pullia, A, and Ripamonti, G. 1999.
"Automatic pole-zero/zero-pole digital compensator for high-resolution spectroscopy: Design and experiments". United States. https://doi.org/10.1109/23.790684.
@article{osti_684538,
title = {Automatic pole-zero/zero-pole digital compensator for high-resolution spectroscopy: Design and experiments},
author = {Geraci, A and Pullia, A and Ripamonti, G},
abstractNote = {In a high-resolution spectroscopy system the relatively long exponential decay due to the charge preamplifier is customarily canceled in an analogue fashion by means of a PZ (Pole-Zero) stage. The accurateness of such a compensation has a big impact on the energy resolution because it strongly affects the baseline-stability problems. The authors have automatically and on-line performed such a compensation in a digital way, while maintaining a spectroscopy performance and keeping at minimum both the ADC sampling frequency (thus power consumption) and its resolution (thus cost). This is done through an IIR filter, implemented within a FPGA by a DSP. The so-compensated waveform has, in excellent approximation, an all-pole shape. Starting from such a signal, the minimum-noise filters for energy and/or time measurements are then promptly synthesized and implemented for real time operation through the same DSP.},
doi = {10.1109/23.790684},
url = {https://www.osti.gov/biblio/684538},
journal = {IEEE Transactions on Nuclear Science},
number = 4Pt1,
volume = 46,
place = {United States},
year = {Sun Aug 01 00:00:00 EDT 1999},
month = {Sun Aug 01 00:00:00 EDT 1999}
}