论文部分内容阅读
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 sig-nal, they are widely used in processing nuclear pulse sig-nals. 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 charac-teristics 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 character-istics, the third-order multiple feedback low-pass digital shaping has better noise suppression performance, and the multiple feedback digital shaping takes into account bothpulse amplitude extraction and noise suppression performance.