A PLL frequency synthesiser using a bandpass sigma-delta digital oscillator as the frequency reference is described. The system emphasises digital signal processing and allows the use of a wideband loop filter.
Inspec keywords: frequency synthesizers; phase locked loops; sigma-delta modulation
Other keywords:
Subjects: Signal generators; Modulators, demodulators, discriminators and mixers
References
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1)
- T.A. Riley , M.A. Copeland , T.A. Kwasniewski . Delta-sigma modulation in fractional-N frequency synthesis. IEEE J. Solid State Circuits , 5 , 553 - 559
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- R. Schreier , M. Snelgrove . Bandpass sigma-delta modulation. Electron. Lett. , 23 , 1560 - 1561
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- Veillette, B.R., Roberts, G.W.: `High frequency sinusoidal generation using delta-sigma modulation techniques', Proc. Int. Symp. Circuits Syst., 1995, 1, Seattle, USA, p. 637–640.
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- L. Larsen , T. Cataltepe , G. Temes . Multi-bit oversampled ΣΔ A/D converter with digital errorcorrection. Electron. Lett. , 16 , 1051 - 1052
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- A.K. Lu , G.W. Roberts , D.A. Johns . A high-quality analog oscillator using oversampling D/A conversion techniques. IEEE Trans. Circuits Syst. II , 7 , 437 - 444
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- J.A. Crawford . (1994) Frequency synthesiser design handbook.
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- R.E. Ziemer , R.L. Peterson . (1992) Introduction to digital communication.
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http://iet.metastore.ingenta.com/content/journals/10.1049/el_19961131
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