Robust H-2 approach for digital correction of cascaded sigma delta modulators

TY - JOUR

T1 - Robust H-2 approach for digital correction of cascaded sigma delta modulators

AU - Yang, F

AU - Gani, M

PY - 2007/8

Y1 - 2007/8

N2 - In this paper, we present a robust H-2 approach to digitally correct for analog circuit imperfections in a 2-1 cascaded sigma delta modulator. A low-order filter with the same order of the nominal filter is designed, which can efficiently handle a more substantive deviation of the coefficients of the analog filter away from the design values without any extra implementation burden. Simulation results show that the proposed filter provides a strong robustness to circuit imperfections and guarantees an improved signal-to-noise ratio performance over the nominal filter

AB - In this paper, we present a robust H-2 approach to digitally correct for analog circuit imperfections in a 2-1 cascaded sigma delta modulator. A low-order filter with the same order of the nominal filter is designed, which can efficiently handle a more substantive deviation of the coefficients of the analog filter away from the design values without any extra implementation burden. Simulation results show that the proposed filter provides a strong robustness to circuit imperfections and guarantees an improved signal-to-noise ratio performance over the nominal filter

U2 - 10.1007/s00034-007-4010-z

DO - 10.1007/s00034-007-4010-z

M3 - Article

VL - 26

SP - 607

EP - 618

JO - CIRCUITS SYSTEMS AND SIGNAL PROCESSING

JF - CIRCUITS SYSTEMS AND SIGNAL PROCESSING

IS - 4

ER -