Open Science Research Excellence
@article{(International Science Index):http://waset.org/publications/5283,
  title    = {High Order Cascade Multibit ΣΔ Modulator for Wide Bandwidth Applications},
  author    = {S. Zouari and  H. Daoud and  M. Loulou and  P. Loumeau and  N. Masmoudi},
  country   = {},
  institution={},
  abstract  = {A wideband 2-1-1 cascaded ΣΔ modulator with a
single-bit quantizer in the two first stages and a 4-bit quantizer in the
final stage is developed. To reduce sensitivity of digital-to-analog
converter (DAC) nonlinearities in the feedback of the last stage,
dynamic element matching (DEM) is introduced. This paper presents
two modelling approaches: The first is MATLAB description and the
second is VHDL-AMS modelling of the proposed architecture and
exposes some high-level-simulation results allowing a behavioural
study. The detail of both ideal and non-ideal behaviour modelling are
presented. Then, the study of the effect of building blocks
nonidealities is presented; especially the influences of nonlinearity,
finite operational amplifier gain, amplifier slew rate limitation and
capacitor mismatch. A VHDL-AMS description presents a good
solution to predict system-s performances and can provide sensitivity
curves giving the impact of nonidealities on the system performance.},
    journal   = {International Journal of Electrical, Computer, Energetic, Electronic and Communication Engineering},  volume    = {1},
  number    = {9},
  year      = {2007},
  pages     = {1337 - 1343},
  ee        = {http://waset.org/publications/5283},
  url       = {http://waset.org/Publications?p=9},
  bibsource = {http://waset.org/Publications},
  issn      = {eISSN:1307-6892},
  publisher = {World Academy of Science, Engineering and Technology},
  index     = {International Science Index 9, 2007},
}