Digital high-pass filter deconvolution by means of an infinite impulse response filter
In the application of semiconductor detectors, the charge-sensitive amplifier is widely used in front-end electronics. The output signal is shaped by a typical exponential decay. Depending on the feedback network, this type of front-end electronics suffers from the ballistic deficit problem, or an i...
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| creator | Födisch, P Wohsmann, J Lange, B Schönherr, J Enghardt, W Kaever, P |
| description | In the application of semiconductor detectors, the charge-sensitive amplifier is widely used in front-end electronics. The output signal is shaped by a typical exponential decay. Depending on the feedback network, this type of front-end electronics suffers from the ballistic deficit problem, or an increased rate of pulse pile-ups. Moreover, spectroscopy applications require a correction of the pulse-height, while a shortened pulse-width is desirable for high-throughput applications. For both objectives, digital deconvolution of the exponential decay is convenient. With a general method and the signals of our custom charge-sensitive amplifier for cadmium zinc telluride detectors, we show how the transfer function of an amplifier is adapted to an infinite impulse response (IIR) filter. This paper investigates different design methods for an IIR filter in the discrete-time domain and verifies the obtained filter coefficients with respect to the equivalent continuous-time frequency response. Finally, the exponential decay is shaped to a step-like output signal that is exploited by a forward-looking pulse processing. |
| doi_str_mv | 10.48550/arxiv.1604.08750 |
| format | Article |
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| language | eng |
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| source | Freely Accessible Journals; arXiv.org |
| subjects | Amplifiers Cadmium zinc tellurides Decay Deconvolution Detectors Electronics Frequency response High pass filters IIR filters Impulse response Physics - Instrumentation and Detectors Pulse duration Receivers & amplifiers Signal processing Transfer functions Zinc telluride Zinc tellurides |
| title | Digital high-pass filter deconvolution by means of an infinite impulse response filter |
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