1987
DOI: 10.1515/freq.1987.41.11-12.329
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Consideration of the Loop Delay for the Dimensioning of Analog Feedback Coders

Abstract: We present a detailed model of an analog feedback coder (sigma-delta modulator) which allows an exact calculation of transfer functions. This model -which is verified by experimental results -shows that the loop delay t dl (conversion time of ADC plus D AC) must not be neglected but must be taken into account.The influence of f d , on the transfer function is investigated by means of the "modified z-transform" and the results are confirmed by measurements. The correct taking into account of the loop delay lead… Show more

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“…Charakteristisch sind dabei die symmetrisch zu den Amplitudenwerten (10) mit l<m<2N, 0</<m liegenden Rauschspitzen [5,7,8]. Charakteristisch sind dabei die symmetrisch zu den Amplitudenwerten (10) mit l<m<2N, 0</<m liegenden Rauschspitzen [5,7,8].…”
Section: Introductionunclassified
“…Charakteristisch sind dabei die symmetrisch zu den Amplitudenwerten (10) mit l<m<2N, 0</<m liegenden Rauschspitzen [5,7,8]. Charakteristisch sind dabei die symmetrisch zu den Amplitudenwerten (10) mit l<m<2N, 0</<m liegenden Rauschspitzen [5,7,8].…”
Section: Introductionunclassified