Improvement in the linearity of fast digital oscilloscopes used in averaging mode

Author

Lembeye, Yves ; Kéradec, Jean Pierre ; Cauffet, Gilles

Author_Institution

Lab. d´´Electrotechnique de Grenoble, Domaine Univ., France

Volume

43

Issue

6

fYear

1994

fDate

12/1/1994 12:00:00 AM

Firstpage

922

Lastpage

928

Abstract

Accurate measurement of signals with very fast variations between values separated by several orders of magnitude is difficult. When signals are periodical, a fast digital oscilloscope may be used in averaging mode, but the measurement accuracy is mainly limited by analog-to-digital conversion (ADC) nonlinearity. In this paper, several methods for improving the conversion linearity are proposed. These methods are theoretically justified and experimentally validated. Several of these methods may be used simultaneously by an 8-bit digital oscilloscope to provide, in averaging mode, the linearity of an 11- or 12-bit ADC

Keywords

Fourier series; analogue-digital conversion; calibration; digital storage oscilloscopes; linearisation techniques; signal processing; analog-to-digital conversion; averaging mode; conversion linearity; digital oscilloscope; fast digital oscilloscopes; measurement accuracy; quantisation nonlinearity; smoothing; Digital filters; Electronic equipment manufacture; Frequency measurement; Linearity; Noise measurement; Oscilloscopes; Power electronics; Quantization; Switches; Voltage;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.368074

Filename

368074