The single-channel analyzer (SCA) has been a basic instrument for measuring pulse amplitude in the nuclear field for many years. The history of the SCA and detailed design discussions of both early and recent developments can be found in Refs. 1–3. The SCA has two adjustable voltage levels and produces an output pulse when the peak of the input pulse falls between these two levels. The region between these two adjusted voltage levels is referred to as a channel or window. A digital output pulse is produced for each input pulse whose amplitude falls within the selected window. Two discriminators monitor the input signal and a logic circuit produces a digital output pulse. In this way, the SCA can be considered an analog-to-digital converter.
KeywordsOutput Pulse Window Width Peak Detection Input Pulse Bipolar Pulse
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