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20190325110258.0 |
| 008 |
030808s2002 xx a b 000 0 eng d |
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|a (OCoLC)ocm52817177
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|a 30-72493
|b UMI
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|a TXA
|c TXA
|d UtOrBLW
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| 049 |
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|a TXAM
|a TXAR
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| 099 |
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|a 2002
|a Dissertation
|a L591
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| 100 |
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|a Liu, Hengsheng.
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| 245 |
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|a Automatic tuning for high frequency continuous-time bandpass filters /
|c by Hengsheng Liu.
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| 264 |
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|a [Place of publication not identified] :
|b [publisher not identified] ;
|c 2002.
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| 300 |
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|a xi, 139 leaves :
|b illustrations ;
|c 28 cm.
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| 336 |
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|a text
|b txt
|2 rdacontent
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| 337 |
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|a unmediated
|b n
|2 rdamedia
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| 338 |
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|a volume
|b nc
|2 rdacarrier
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| 502 |
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|b Ph. D.
|c Texas A&M University
|d 2002.
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| 504 |
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|a Includes bibliographical references (leaves 132-138).
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| 500 |
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|a Vita.
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| 500 |
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|a "Major Subject: Electrical Engineering".
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| 530 |
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|a Issued also on microfiche from University Microfilm Inc.
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| 520 |
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|a A novel automatic tuning scheme for continuous-time bandpass filters is presented. It is based on gain comparison at three different frequencies. The tuning scheme incorporates a PLL-based frequency synthesizer which generates the required references, a peak detector, two switched-capacitor integrators which conduct gain comparison and generate frequency and quality factor tuning voltages, and a state machine to generate synchronous clocks for all the building blocks in the tuning circuitry. Q-factor is digitally set through the frequency divider of the frequency synthesizer. The tuning scheme does not rely on the assumption that Q is equal to the filter's passband gain. The tuning scheme is robust and can also be applied to filters in which the Q-factor is not a known function of the passband gain. The tuning scheme has a significant advantage over previously published tuning schemes for high-frequency, high-Q filters. It has a small silicon area overhead, small power consumption, and very good frequency and Q-tuning accuracy. Theoretical analysis and experimental results are provided. A second-order transconductance-C biquadratic filter is designed to demonstrate the proposed tuning circuitry. The test chip is fabricated in AMI 0.5[]m CMOS process. The measured results show the frequency error is 0.25%, Q error is 3% for a 200 MHz filter with a desired Q of 28.6. Other results such as the filter's dynamic range, noise performance and intermodulation are also presented. In addition, a design of a 2 GHz active LC filter tuning circuitry and its simulation results are provided.
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| 650 |
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|a Major electrical engineering.
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|a Texas A&M University
|b College Station
|c Cushing Memorial Library & Archives
|s cush tdrm
|d Cushing: Theses & Dissertations Microforms (Does not check out)
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|a Texas A&M University
|b College Station
|c Electronic Resources
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|e 2002 Dissertation L591
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|a 2002 Dissertation L591
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