Digitalization of inverting filter shaping circuit for nuclear pulse signals
- PDF / 661,431 Bytes
- 9 Pages / 595.276 x 790.866 pts Page_size
- 45 Downloads / 203 Views
(0123456789().,-volV) (0123456789().,-volV)
Digitalization of inverting filter shaping circuit for nuclear pulse signals Huai-Qiang Zhang1,2
•
Hong-Tao Shi2 • Zhuo-Dai Li2
•
Yu-Wen Li2
Received: 29 February 2020 / Revised: 22 July 2020 / Accepted: 24 July 2020 Ó China Science Publishing & Media Ltd. (Science Press), Shanghai Institute of Applied Physics, the Chinese Academy of Sciences, Chinese Nuclear Society and Springer Nature Singapore Pte Ltd. 2020
Abstract In the design of filter shaping circuits for nuclear pulse signals, inverting filter shaping circuits perform better than non-inverting filter shaping circuits. Because these circuits facilitate changing the phase of a pulse signal, they are widely used in processing nuclear pulse signals. In this study, the transfer functions of four types of inverting filter shaping circuits, namely the common inverting filter shaping, improved inverting filter shaping, multiple feedback low-pass filter shaping, and third-order multiple feedback low-pass filter shaping, in the Laplacian domain, are derived. We establish the numerical recursive function models and digitalize the four circuits, obtain the transfer functions in the Z domain, and analyze the filter performance and amplitude–frequency response characteristics in the frequency domain. Based on the actual nuclear pulse signal of the Si-PIN detector, we realize four types of inverting digital shaping. The results show that under the same shaping parameters, the common inverting digital shaping has better amplitude extraction characteristics, the third-order multiple feedback low-pass digital shaping has better noise suppression performance, and the multiple feedback digital shaping takes into account both
This work was supported by the National Key R&D Project (No. 2017YFF0106503 ), National Natural Science Foundation of China (Nos. 11665001 and 41864007). & Huai-Qiang Zhang [email protected] 1
State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, China
2
School of Nuclear Science and Engineering, East China University of Technology, Nanchang 330013, China
pulse amplitude performance.
extraction
and
noise
suppression
Keywords Nuclear pulse signal Inverting filter shaping circuit Digital shaping Amplitude–frequency response
1 Introduction When nuclear pulse signals are processed, the output nuclear pulse signal of the pre-amplified needs to be filtered and shaped to improve the signal-to-noise ratio (SNR) of the system and change the pulse shape for subsequent processing. Several studies have focused on analog non-inverting filter shaping circuits for nuclear pulse signals. Evariste et al. designed and developed a set of amplifier filter shaping circuits for Si (Li), CdZnTe and CsI detectors, which included a fourth-order integration stage and a differentiation stage [1]. Gan et al. designed a lownoise nuclear pulse signal processing system, in which CRRC was used to realize filter shaping [2]. Gao et al. designed CR-RC and Sallen–
Data Loading...
