High-accuracy fit of the poles of spectroscopy amplifiers designed for mixed analog-digital filtering

Journal Article · Tue Apr 01 00:00:00 EST 1997 · IEEE Transactions on Nuclear Science

DOI:https://doi.org/10.1109/23.568793· OSTI ID:477311

Bittanti, S; Gatti, E; Ripamonti, G; Savaresi, S M ^[1]

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1. Politecnico di Milano (Italy). Dipt. of Elettronica e Informazione

In this paper, a method for the identification of the poles` and zeros` position of an analog amplifier for nuclear spectroscopy used as a prefilter for a subsequent digital filter setup is presented. The proposed technique is based upon a subspace-based system state-space identification (4SID) method, which is well suited to a data set constituted by a noisy measurement of the sampled impulse response of the circuit. The algorithm runs unassisted and does not require skills by the operator. The experiments confirm that by using the so-obtained pole values, the shape of the impulse response of the amplifier can be fit with much better than 1% accuracy. Consequently, the overall filtering (analog + digital) can have finite duration and a top with a flatness much better than 1%.

• OSTI ID: 477311
• Journal Information: IEEE Transactions on Nuclear Science, Vol. 44, Issue 2; Other Information: PBD: Apr 1997
• Country of Publication: United States
• Language: English

Related Subjects

44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
SPECTROMETERS
AMPLIFIERS
ANALOG SYSTEMS
DIGITAL FILTERS
ALGORITHMS
ANALOG-TO-DIGITAL CONVERTERS