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Arbitrary Design of High Order Noise Transfer Function for A Novel Class of Reduced-Sample-Rate Sigma-Delta-Pipeline ADCs

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2 Author(s)
V. Majidzadeh ; IC Design Center, ECE Department, University of Tehran, Tehran, Iran, v. majidzadeh@ece.ut.ac.ir ; O. Shoaei

A novel noise transfer function (NTF) for high order reduced-sample-rate sigma-delta-pipeline (SDP) ADCs is presented. The proposed NTF determines the location of the non-zero poles improving the stabilization of the loop and implementing the reduced-sample-rate structure, concurrently. A design methodology based on simulated-annealing-algorithm is developed to design the optimum NTF. To verify the usefulness of the proposed NTF and design procedure, two different modulators are presented. Simulation results show that with a 4th order modulator, designed making use of the proposed approach, the maximum SNDR of 115dB and 124.1dB can be achieved with only OSR of 8, and 16 respectively.

Published in:

Proceedings of the Design Automation & Test in Europe Conference  (Volume:1 )

Date of Conference:

6-10 March 2006