DocumentCode
2832420
Title
Intermodulation in sigma-delta D/A converters
Author
Karema, Teppo ; Ritoniemi, Tapani ; Tenhunen, Hannu
Author_Institution
Signal Process. Lab., Tampere Univ. of Technol., Finland
fYear
1991
fDate
11-14 Jun 1991
Firstpage
1625
Abstract
A novel model for the quantization noise modulation to the baseband is proposed and analyzed. It is shown that the quantization noise intermodulation is independent of the input signal level for practical oversampling ratios. The intermodulation is caused by the nonlinearities of the sample and hold device in the 1-bit D/A. Useful equations for estimating the modulating quantization noise in the baseband from measurable parameters are presented. Several circuit considerations are discussed to reduce the unwanted effects of the nonlinearities
Keywords
delta modulation; digital-analogue conversion; intermodulation; modulators; random noise; 1 bit; baseband noise; intermodulation; oversampling ratios; quantization noise modulation; sample and hold device nonlinearities; sigma-delta D/A converters; Baseband; Circuit noise; Delta-sigma modulation; Filters; Noise level; Noise shaping; Quantization; Signal processing; Signal to noise ratio; Voltage;
fLanguage
English
Publisher
ieee
Conference_Titel
Circuits and Systems, 1991., IEEE International Sympoisum on
Print_ISBN
0-7803-0050-5
Type
conf
DOI
10.1109/ISCAS.1991.176694
Filename
176694
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