ANALYSIS OF 2ND-ORDER HARMONIC DISTORTION OF ADC USING BISPECTRUM

Citation
Xm. Gao et al., ANALYSIS OF 2ND-ORDER HARMONIC DISTORTION OF ADC USING BISPECTRUM, IEEE transactions on instrumentation and measurement, 45(1), 1996, pp. 50-55
Citations number
8
Categorie Soggetti
Engineering, Eletrical & Electronic","Instument & Instrumentation
ISSN journal
00189456
Volume
45
Issue
1
Year of publication
1996
Pages
50 - 55
Database
ISI
SICI code
0018-9456(1996)45:1<50:AO2HDO>2.0.ZU;2-2
Abstract
This paper presents a new frequency-domain approach to test the second -order harmonic distortion of an analog-to-digital converter (ADC), It uses triple correlation and its Fourier transform, bispectrum, to sup press quantization noise and improve the testing accuracy of weak seco nd-order harmonics, Our approach is independent of the triggering dela y that is a known weakness of the spectral averaging method, The new m ethod is also less sensitive to the quantization noise than the power spectrum averaging method. Both theoretical analyses and illustrative computer simulations are provided.