TY - GEN
T1 - Characterization of Non-Uniform 2-bit Sigma-Delta Modulator for Gamma-Ray Detectors
AU - Ruiz-Gonzalez, Maria
AU - Furenlid, Lars R.
N1 - Funding Information:
Manuscript received December 10, 2019. This work was supported in part by NIH/NIBIB under grants P41-EB002035 and R01-EB022521. Corresponding author: Maria Ruiz-Gonzalez.
Publisher Copyright:
© 2019 IEEE.
PY - 2019/10
Y1 - 2019/10
N2 - To reduce the complexity of the front-end electronics of systems with large number of channels, we have proposed a novel analog-to-digital conversion method based on non-uniform 2-bit sigma-delta modulation. The proposed method simplifies the data acquisition for gamma-ray detectors that require waveform capture to perform analyses such as pile-up detection, pulse-shape discrimination, and maximum-likelihood energy and timing estimation. The modulator consists of an integrator, three comparators with programmable thresholds, one R-2R ladder digital-to-analog converter, and a field-programmable gate array. We have designed a nine-channel front-end board based on a combination of 1-bit SDM for energy estimation, and 2-bit SDM for timing estimation and waveform analysis. In this work, we present the characterization of the non-uniform 2-bit sigma-delta modulator for gamma-ray detection. The metrics utilized to measure performance are integral non-linearity, differential non-linearity, and timing resolution.
AB - To reduce the complexity of the front-end electronics of systems with large number of channels, we have proposed a novel analog-to-digital conversion method based on non-uniform 2-bit sigma-delta modulation. The proposed method simplifies the data acquisition for gamma-ray detectors that require waveform capture to perform analyses such as pile-up detection, pulse-shape discrimination, and maximum-likelihood energy and timing estimation. The modulator consists of an integrator, three comparators with programmable thresholds, one R-2R ladder digital-to-analog converter, and a field-programmable gate array. We have designed a nine-channel front-end board based on a combination of 1-bit SDM for energy estimation, and 2-bit SDM for timing estimation and waveform analysis. In this work, we present the characterization of the non-uniform 2-bit sigma-delta modulator for gamma-ray detection. The metrics utilized to measure performance are integral non-linearity, differential non-linearity, and timing resolution.
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U2 - 10.1109/NSS/MIC42101.2019.9059641
DO - 10.1109/NSS/MIC42101.2019.9059641
M3 - Conference contribution
AN - SCOPUS:85083590903
T3 - 2019 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2019
BT - 2019 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2019
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2019 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2019
Y2 - 26 October 2019 through 2 November 2019
ER -