Accession Number : ADD009788

Title :   Statistical Method of Measuring the Differential Linearity of An Analog/Digital Converter Using a Pseudo-Random Triangle Wave Stimulus.

Descriptive Note : Patent,


Personal Author(s) : Frech,John W ; Au,Lonnie C

Report Date : 28 Sep 1982

Pagination or Media Count : 8

Abstract : The differential linerity 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 ech 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 :   *Patents, *Analog to digital converters, *Linearity, *Statistical processes, *Test methods, Microprocessors, Measurement, Waveforms, Probability density functions, Counters

Subject Categories : Electrical and Electronic Equipment
      Statistics and Probability
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE