Domino Free 4-Path Time-Interleaved Second Order Sigma-Delta Modulator

A domino free 4-path time-interleaved second order sigma-delta modulator is proposed. This time-interleaved scheme uses only one integrator channel along with incomplete integrator output terms to completely eliminate the quantizer domino which is a key limit for the practical circuit implementation...

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Bibliographic Details
Published in:Analog integrated circuits and signal processing 2005-06, Vol.43 (3), p.225-235
Main Authors: Lee, Kye-shin, Choi, Yunyoung, Maloberti, Franco
Format: Article
Language:English
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Summary:A domino free 4-path time-interleaved second order sigma-delta modulator is proposed. This time-interleaved scheme uses only one integrator channel along with incomplete integrator output terms to completely eliminate the quantizer domino which is a key limit for the practical circuit implementation of conventional multi-path time-interleaved sigma-delta modulators. In addition, the single integrator channel leads to considerable hardware reduction as well as path mismatch insensitivity, since only one global feedback path is required. As a result, the switched capacitor implementation of the 4-path time-interleaved second order sigma-delta modulator is enabled with the conventional 2-phase clocking scheme by using only 5 op-amps.
ISSN:0925-1030
1573-1979
DOI:10.1007/s10470-005-1604-3