Limitations of the VCO-Based Quantizer

  • Samantha Yoder
  • Mohammed Ismail
  • Waleed Khalil
Part of the SpringerBriefs in Electrical and Computer Engineering book series (BRIEFSELECTRIC)


In the following sections, both quantizers are compared in the presence of circuit nonidealities such as VCO nonlinearity, phase noise, and sampling clock jitter. These nonidealities are added to the VerilogA model, and theoretical equations are derived to verify the effects on each quantizer. Although the FDC has been widely adopted due to its inherent first-order noise shaping characteristic, the noise shaping is shown to degrade in the presence of phase noise and clock jitter. Other circuit nonidealities exist but are ignored in this analysis since these quantizers are highly digital circuits.


Phase Noise Tuning Curve Total Harmonic Distortion Integration Error Noise Transfer Function 
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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Samantha Yoder
    • 1
  • Mohammed Ismail
    • 2
  • Waleed Khalil
    • 1
  1. 1.The ElectroScience LaboratoryThe Ohio State UniversityColumbusUSA
  2. 2.Department of Electrical and Computer EngineeringThe Ohio State UniversityColumbusUSA

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