
Accession Number : ADD006978
Title : Statistical Method of Measuring the Differential Linearity of an Analog/Digital Converter Using a PseudoRandom Triangle Wave Stimulus.
Descriptive Note : Patent Application,
Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC
Personal Author(s) : Frech,John W
Report Date : 21 Jan 1980
Pagination or Media Count : 16
Abstract : The differential linearity of an analog/digital converter is measured by a test method that eliminates the need for precision calibrated test equipment. A triangle waveform with a pseudo random period is applied to the analog/digital converter input. The waveform has a uniform amplitude probability density function. Therefore, any analog/digital converter input voltage has an equal chance of being sampled by the analog/digital converter. The number of times each possible analog/digital converter output code word occurs is counted by a microprocessor. These numbers are a direct measure of differential linearity with an accuracy described by the theory of repeated random sampling. (Author)
Descriptors : *Patent applications, *Linearity, *Analog to digital converters, Pseudo random systems, Waveforms, Triangles, Amplitude, Probability density functions, Microprocessors, Sampling, Transfer functions
Subject Categories : Electrical and Electronic Equipment
Distribution Statement : APPROVED FOR PUBLIC RELEASE