Design Considerations for Autocalibrations of Wide-Band ΔΣ Fractional-N PLL Synthesizers
Autocalibration of VCO frequency and loop gain is an essential process in PLL frequency synthesizers. In a wide tuning-range fractional-N PLL frequency synthesizer, high-speed and high-precision automatic calibration is especially important for shortening the lock time and improving the phase noise....
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Wiley
2011-01-01
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| Series: | Journal of Electrical and Computer Engineering |
| Online Access: | http://dx.doi.org/10.1155/2011/139183 |
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| _version_ | 1832560099260891136 |
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| author | Jaewook Shin Hyunchol Shin |
| author_facet | Jaewook Shin Hyunchol Shin |
| author_sort | Jaewook Shin |
| collection | DOAJ |
| description | Autocalibration of VCO frequency and loop gain is an essential process in PLL frequency synthesizers. In a wide tuning-range fractional-N PLL frequency synthesizer, high-speed and high-precision automatic calibration is especially important for shortening the lock time and improving the phase noise. This paper reviews the design issues of the PLL auto-calibration and discusses on the limitations of the previous techniques. A very simple and efficient auto-calibration method based on a high-speed frequency-to-digital converter (FDC) is proposed and verified through simulations. The proposed method is highly suited for a very wide-band ΔΣ fractional-N PLL. |
| format | Article |
| id | doaj-art-37b14c7b44ec4d66818852c53f5abd4a |
| institution | Kabale University |
| issn | 2090-0147 2090-0155 |
| language | English |
| publishDate | 2011-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Electrical and Computer Engineering |
| spelling | doaj-art-37b14c7b44ec4d66818852c53f5abd4a2025-02-03T01:28:25ZengWileyJournal of Electrical and Computer Engineering2090-01472090-01552011-01-01201110.1155/2011/139183139183Design Considerations for Autocalibrations of Wide-Band ΔΣ Fractional-N PLL SynthesizersJaewook Shin0Hyunchol Shin1High-Speed Integrated Circuits and Systems Laboratory, Kwangwoon University, Seoul 139-701, Republic of KoreaHigh-Speed Integrated Circuits and Systems Laboratory, Kwangwoon University, Seoul 139-701, Republic of KoreaAutocalibration of VCO frequency and loop gain is an essential process in PLL frequency synthesizers. In a wide tuning-range fractional-N PLL frequency synthesizer, high-speed and high-precision automatic calibration is especially important for shortening the lock time and improving the phase noise. This paper reviews the design issues of the PLL auto-calibration and discusses on the limitations of the previous techniques. A very simple and efficient auto-calibration method based on a high-speed frequency-to-digital converter (FDC) is proposed and verified through simulations. The proposed method is highly suited for a very wide-band ΔΣ fractional-N PLL.http://dx.doi.org/10.1155/2011/139183 |
| spellingShingle | Jaewook Shin Hyunchol Shin Design Considerations for Autocalibrations of Wide-Band ΔΣ Fractional-N PLL Synthesizers Journal of Electrical and Computer Engineering |
| title | Design Considerations for Autocalibrations of Wide-Band ΔΣ Fractional-N PLL Synthesizers |
| title_full | Design Considerations for Autocalibrations of Wide-Band ΔΣ Fractional-N PLL Synthesizers |
| title_fullStr | Design Considerations for Autocalibrations of Wide-Band ΔΣ Fractional-N PLL Synthesizers |
| title_full_unstemmed | Design Considerations for Autocalibrations of Wide-Band ΔΣ Fractional-N PLL Synthesizers |
| title_short | Design Considerations for Autocalibrations of Wide-Band ΔΣ Fractional-N PLL Synthesizers |
| title_sort | design considerations for autocalibrations of wide band δσ fractional n pll synthesizers |
| url | http://dx.doi.org/10.1155/2011/139183 |
| work_keys_str_mv | AT jaewookshin designconsiderationsforautocalibrationsofwidebanddsfractionalnpllsynthesizers AT hyuncholshin designconsiderationsforautocalibrationsofwidebanddsfractionalnpllsynthesizers |