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An 8MHz, 72 dB SFDR Asynchronous Sigma-Delta Modulator with 1.5mW power dissipation

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5 Author(s)
Ouzounov, S. ; Eindhoven Univ. of Technol., Netherlands ; Roza, E. ; Hegt, H. ; van der Weide, G.
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An Asynchronous Sigma-Delta Modulator (ASDM) that achieves a SFDR of 72 dB with a bandwidth of 8 MHz is presented. The ASDM operates as a closed-loop, nonlinear system. Spectral analysis of the ASDM shows that a center frequency of at least 100 MHz is required for these specifications. Circuit implementations are presented and a prototype ASDM is realized in a digital 0.18 micrometer, 1.8V CMOS technology. The ASDM dissipates 1.5mW and has an area of 0.026mm2.

Published in:

VLSI Circuits, 2004. Digest of Technical Papers. 2004 Symposium on

Date of Conference:

17-19 June 2004