Code transition error effects on estimation of nonlinearity and ENOB of an A/D converter

Effects of error in code transition levels on nonlinearity and effective number of bits (ENOB) of an analog to digital converter (ADC) are presented in this article. Error in code transition level is determined by deviation of code transition levels from the mean of the estimated code transition lev...

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Bibliographic Details
Published in:International journal of electronics 2011-11, Vol.98 (11), p.1503-1515
Main Authors: Gamad, R.S., Mishra, D.K.
Format: Article
Language:English
Subjects:
Analog to digital converters
Applied sciences
Circuit properties
code transition levels
Codes
Computation
Deviation
differential nonlinearity
Electric, optical and optoelectronic circuits
Electrical equipment
Electronic circuits
Electronics
ENOB
Error analysis
Errors
Estimates
Exact sciences and technology
integral nonlinearity
Integrated circuits
Integrated circuits by function (including memories and processors)
Noise
Nonlinear equations
Nonlinearity
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Signal convertors
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Description
Summary:Effects of error in code transition levels on nonlinearity and effective number of bits (ENOB) of an analog to digital converter (ADC) are presented in this article. Error in code transition level is determined by deviation of code transition levels from the mean of the estimated code transition levels. Errors in estimate of differential nonlinearity (DNL), integral nonlinearity (INL) and ENOB are computed by considering error in code transition levels and computing corresponding values. In this study, 5- and 8-bit ADC transfer characteristics are simulated and arbitrary nonlinearity errors are introduced. Suitable corrections are applied in code transition levels and computation of estimate of nonlinearity with and without corrections are reported. Results have been compared with earlier published work and improvements are observed. Effects of overdrive and additive noise on ENOB for 5-bit ADC are also reported.
ISSN:0020-7217
1362-3060
DOI:10.1080/00207217.2011.601440