A digitally temperature-compensated crystal oscillator

A digitally temperature-compensated crystal oscillator

The base frequency of oscillators used in the Global System for Mobile Communication (GSM) network or Global Positioning System (GPS) receiver applications needs to be very stable with respect to temperature and supply-voltage variations. One approach to obtain extremely good frequency stability is...

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Veröffentlicht in:IEEE journal of solid-state circuits 2000-10, Vol.35 (10), p.1502-1506
Hauptverfasser: Achenbach, R., Feuerstack-Raible, M., Hiller, F., Keller, M., Meier, K., Rudolph, H., Saur-Brosch, R.
Format: Artikel
Sprache:eng
Schlagworte:
Application specific integrated circuits
Circuit stability
CMOS integrated circuits
CMOS process
Communication systems
Crystal oscillators
Crystals
Energy consumption
Frequency
Frequency stability
Global Positioning System
GSM
Oscillators
Product introduction
Satellite navigation systems
Temperature distribution
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Beschreibung
Zusammenfassung:The base frequency of oscillators used in the Global System for Mobile Communication (GSM) network or Global Positioning System (GPS) receiver applications needs to be very stable with respect to temperature and supply-voltage variations. One approach to obtain extremely good frequency stability is the use of oven-stabilized crystal oscillators. With this kind of oscillator, a frequency stability versus temperature of a few ppb versus the standard temperature range can be achieved. In this paper, a digitally compensated crystal oscillator is described. The system provides a frequency stability of (/spl Delta/f)/f
ISSN:0018-9200
1558-173X
DOI:10.1109/4.871329