Open Science Research Excellence
@article{(International Science Index):http://waset.org/publications/10008472,
  title    = {The Excess Loop Delay Calibration in a Bandpass Continuous-Time Delta Sigma Modulators Based on Q-Enhanced LC Filter},
  author    = {Sorore Benabid},
  country   = {France},
  institution={Polytechnic Institute of Advanced Sciences},
  abstract  = {The Q-enhanced LC filters are the most used
architecture in the Bandpass (BP) Continuous-Time (CT)
Delta-Sigma (ΣΔ) modulators, due to their: high frequencies
operation, high linearity than the active filters and a high quality
factor obtained by Q-enhanced technique. This technique consists
of the use of a negative resistance that compensate the ohmic
losses in the on-chip inductor. However, this technique introduces a
zero in the filter transfer function which will affect the modulator
performances in term of Dynamic Range (DR), stability and in-band
noise (Signal-to-Noise Ratio (SNR)). In this paper, we study the
effect of this zero and we demonstrate that a calibration of the
excess loop delay (ELD) is required to ensure the best performances
of the modulator. System level simulations are done for a 2ndorder
BP CT (ΣΔ) modulator at a center frequency of 300MHz. Simulation
results indicate that the optimal ELD should be reduced by 13% to
achieve the maximum SNR and DR compared to the ideal LC-based
ΣΔ modulator.},
    journal   = {International Journal of Electrical, Computer, Energetic, Electronic and Communication Engineering},  volume    = {12},
  number    = {1},
  year      = {2018},
  pages     = {68 - 71},
  ee        = {http://waset.org/publications/10008472},
  url       = {http://waset.org/Publications?p=133},
  bibsource = {http://waset.org/Publications},
  issn      = {eISSN:1307-6892},
  publisher = {World Academy of Science, Engineering and Technology},
  index     = {International Science Index 133, 2018},
}