USING AN INTERPOLATION METHOD FOR NOISE SHAPING IN A/D CONVERTERS

P. Daponte, R. Holcer, L. Horniak, L. Michaeli, S. Rapuano

Abstract

Digital post processing of output data is often used to enhance the ADC Effective Number Of Bits (ENOB). In particular, it can be used to partially recover ENOB restrictions caused by nonlinearities. The paper deals with advantages and disadvantages coming from the application of a proposed nonlinearity correction method based on the Bayes theorem. It allows the reduction of large scale errors in output signal by means of the use of dithering with low peakpeak voltage instead of a high amplitude one. The paper gives a brief description of the method. Then, the results of an experimental investigation carried out on actual ADC output data are presented and discussed.

Keywords

interpolation, noise shaping, ADC correction

Download

IMEKO-TC4-2002-013.pdf

DOI

-

IMEKO TC

TC4 - Measurement of Electrical Quantities

Back to the proceedings