Accession Number : ADD006978

Title :   Statistical Method of Measuring the Differential Linearity of an Analog/Digital Converter Using a Pseudo-Random 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