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Measurement of continuous-time ΣΔ modulators: Implications of using spectrum analyzer

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5 Author(s)
Ashry, A. ; LIP6 Lab., Univ. of Pierre & Marie Curie, Paris, France ; El-Shennawy, A.K. ; Elbadry, M. ; Elsayed, A.
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In this paper, The difference between getting the output spectrum directly using spectrum analyzer and obtaining the spectrum digitally in measuring clock jitter effect on continuous-time ΣΔ modulator is analyzed. It is shown that clock jitter can be seen as input-referred or output-referred, depending on the nature of the measurement tool. Quantization noise and jitter noise are analyzed and compared graphically using a simple approach. The presented analysis is verified with system-level simulation of a 4th order bandpass continuous-time ΣΔ modulator.

Published in:

Microelectronics (ICM), 2010 International Conference on

Date of Conference:

19-22 Dec. 2010