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A double-sampling cross noise-coupled split ΣΔ-modulation A/D converter with 80 dB SNR

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2 Author(s)
De Bock, M. ; Dept. ELIS, Ghent Univ. (UGent), Ghent, Belgium ; Rombouts, P.

This paper presents the design of a double-sampling split ΣΔ-modulation analog-to-digital converter with cross noise-coupling. Double-sampling is used to achieve high conversion speed and low power consumption. To tackle the problem of quantization noise folding due to path mismatch, a fully floating bilinear integrator is used. Then the quantization noise is cross-coupled between two identical ΣΔ-modulators. This increases the effective noise shaping order of this structure with one. The final design is an optimized second order double-sampling split ΣΔ-modulator with third order noise shaping through cross noise-coupling. This design is simulated at transistor level in an 0.18-μm CMOS process for 80 dB SNR and 5 MHz bandwidth.

Published in:

Electronics, Circuits, and Systems, 2009. ICECS 2009. 16th IEEE International Conference on

Date of Conference:

13-16 Dec. 2009

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