Item – Theses Canada

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OCLC number
28213047
Author
Chen, Feng,1963-
Title
Design of multi-bit oversampled AD and DA converters.
Degree
M.A. Sc. -- University of Waterloo, 1991
Publisher
Ottawa : National Library of Canada = Bibliothèque nationale du Canada, 1992.
Description
1 microfiche.
Notes
University Microfilms order no. UMI00307404.
Includes bibliographical references.
Abstract
Third order oversampled ADC and DAC with 3bit internal quantizer have been designed and implemented with 1.2$\mu$ CMOS technology. In order to obtain high accuracy with the low resolution feedback DAC, dynamic element matching techniques have been incorporated into our oversampled ADC and DAC. Simulation shows that the harmonic distortion due to element mismatch in the DAC can be suppressed. The oversampled ADC has a signal-to-noise ratio (SNR) of 96dB based on simulation results for an oversampling ratio of 64. The extracted circuit from the layout runs at a clock rate of 5Mhz with Hspice. A prototype their order oversampled DAC implemented using discrete components has been build and tested. Testing results show that the second harmonic distortion is reduced by 15dB by using individual averaging techniques, compared with conventional D/A structure.
ISBN
0315689544
9780315689541