Automatic calibration of modulated fractional-N frequency synthesizers
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2001.
| Váldodahkki: | |
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| Eará dahkkit: | |
| Materiálatiipa: | Oahppočájánas |
| Giella: | eng |
| Almmustuhtton: |
Massachusetts Institute of Technology
2005
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| Liŋkkat: | http://hdl.handle.net/1721.1/16780 |
| _version_ | 1826197993686040576 |
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| author | McMahill, Dan |
| author2 | Charles G. Sodini. |
| author_facet | Charles G. Sodini. McMahill, Dan |
| author_sort | McMahill, Dan |
| collection | MIT |
| description | Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2001. |
| first_indexed | 2024-09-23T10:57:12Z |
| format | Thesis |
| id | mit-1721.1/16780 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T10:57:12Z |
| publishDate | 2005 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/167802019-04-10T22:31:39Z Automatic calibration of modulated fractional-N frequency synthesizers McMahill, Dan Charles G. Sodini. Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science. Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science. Electrical Engineering and Computer Science. Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2001. Includes bibliographical references (p. 145-148). This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections. The focus of this research has been the development of a low power, radio frequency transmitter architecture. Specifically, a technique for in service automatic calibration of a modulated phase locked loop (PLL) frequency synthesizer has been developed. Phase/frequency modulation is accomplished by modulating the feedback divide value in a phase locked loop frequency synthesizer. A digital precompensation filter is used to extend the modulation bandwidth by canceling the low-pass transfer function of the PLL. The automatic calibration circuit maintains accurate matching between the digital precompensation filter and the analog PLL transfer function across process and temperature variations. The automatic calibration circuit, which is the main contribution of this thesis, operates while the transmitter is in service. This online calibration eliminates the need for production calibration and periodic down time for calibration cycles. (cont.) In addition the calibration circuitry provides greater accuracy in the modulation than what is possible via offline methods of calibration. The calibration circuit works with M-ary GFSK as well as 2 level GFSK. The automatic calibration circuit has been implemented in two forms to prove its operation. The first version is a circuit board level implementation with a center frequency of around 60 MHz. The second implementation of the system is in a full custom 0.6 ,Lm BiCMOS integrated circuit. The integrated circuit contains the complete synthesizer with automatic calibration and operates in the 1.88 GHz frequency band used by the Digital European Cordless Telephone (DECT) standard. A data rate of 2.5 Mbps using 2 level GFSK and 5.0 Mbps using 4 level GFSK has been achieved with a power consumption of 78 mW. by Daniel R. McMahill. Ph.D. 2005-05-19T14:33:58Z 2005-05-19T14:33:58Z 2001 2001 Thesis http://hdl.handle.net/1721.1/16780 49545342 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 179 p. 12781501 bytes 12781233 bytes application/pdf application/pdf application/pdf Massachusetts Institute of Technology |
| spellingShingle | Electrical Engineering and Computer Science. McMahill, Dan Automatic calibration of modulated fractional-N frequency synthesizers |
| title | Automatic calibration of modulated fractional-N frequency synthesizers |
| title_full | Automatic calibration of modulated fractional-N frequency synthesizers |
| title_fullStr | Automatic calibration of modulated fractional-N frequency synthesizers |
| title_full_unstemmed | Automatic calibration of modulated fractional-N frequency synthesizers |
| title_short | Automatic calibration of modulated fractional-N frequency synthesizers |
| title_sort | automatic calibration of modulated fractional n frequency synthesizers |
| topic | Electrical Engineering and Computer Science. |
| url | http://hdl.handle.net/1721.1/16780 |
| work_keys_str_mv | AT mcmahilldan automaticcalibrationofmodulatedfractionalnfrequencysynthesizers |