Adaptive noise shaping in oversampled ADC based on LMS algorithm /
A novel technique for achieving noise shaping in oversampled converters is proposed. The technique proposed in this dissertation leads to an architecture that is similar to a sigma-delta structure. But it is based on a different basic idea. I move from the LMS algorithm and have adapted the resultin...
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| Format: | Thesis Book |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
2000.
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| Subjects: | |
| Online Access: | http://proxy.library.tamu.edu/login?url=http://proquest.umi.com/pqdweb?did=728408541&sid=1&Fmt=2&clientId=2945&RQT=309&VName=PQD |
| Summary: | A novel technique for achieving noise shaping in oversampled converters is proposed. The technique proposed in this dissertation leads to an architecture that is similar to a sigma-delta structure. But it is based on a different basic idea. I move from the LMS algorithm and have adapted the resulting signal processing diagram to achieve a circuit that can be implemented with conventional analog basic blocks. The circuit implementation looks like a sigma-delta modulator but requires limited additional circuits for the necessary multipliers. The fully differential switched capacitor circuitry is employed for the implementation of the proposed modulator. The nonidealities coming from the basic building blocks are examined in SIMULINK. Based on the behavioral simulation results, all specifications of the building blocks are chosen. Simulation results, confirmed by experimental measurements, show that more than 15 dB in the SNR are gained with respect to an equivalent sigma-delta counterpart in the low signal level range. |
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| Item Description: | Vita. "Major Subject: Electrical Engineering". |
| Physical Description: | xiii, 141 leaves : illustrations ; 28 cm. Issued also on microfiche from University Microfilm Inc. |
| Bibliography: | Includes bibliographical references (leaves 133-140). |