Accurate Amplitude Distribution Analyzer Combining Analog and Digital Logic

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Abstract
A new precision analyzer yields digital readout of probability or probability density for random waveforms at low audio frequencies. A preamplifier-limiter conveniently increases a half-volt slicing interval to 20 v or more, and a sample-hold circuit permits the slicer to work slowly and accurately. The use of analog computer techniques permits convenient assembly of such instruments from inexpensive commercial plug-in amplifiers and decimal counters. Some statistical theory is also presented.

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