Multi-bit oversampled ΣΔ A/D converters as front-end for CD-players

Multi-bit oversampled ΣΔ A/D converters as front-end for CD-players

A technique is presented to derive all the control signals needed for focusing and radial tracking in a digital servo system for CD-players, as well as the full-band data, with multi-bit ΣΔ A/D converters. The ΣΔ approach is of great interest because of its suitability to integrate in a VLSI process...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Naus, P. J. A., Dijkmans, E. C.
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Bandwidth
Control systems
Frequency
Lenses
Optical filters
Photodiodes
Sampling methods
Servomechanisms
Signal resolution
Very large scale integration
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Beschreibung
Zusammenfassung:A technique is presented to derive all the control signals needed for focusing and radial tracking in a digital servo system for CD-players, as well as the full-band data, with multi-bit ΣΔ A/D converters. The ΣΔ approach is of great interest because of its suitability to integrate in a VLSI process and no anti-aliasing filter is required due to the oversampling technique.