Precision oven-controlled crystal oscillator

H - Electricity – 03 – L

Patent

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Details

H03L 7/08 (2006.01) H03B 5/04 (2006.01) H03B 5/36 (2006.01) H03L 1/02 (2006.01) H03L 7/099 (2006.01) H03L 7/18 (2006.01)

Patent

CA 2430778

A precision oven-controlled crystal oscillator (10) uses an adjustment feedback signal that, when mixed with a reference signal from a stable reference oscillator (32), accurately controls the generation of an output signal from a voltage controlled crystal oscillator (38). An OCXO according to the invention has high stability and high accuracy. The digital OXCO can be manufactured at low cost, and is particularly beneficial for Code Division Multiple Access (CDMA) base station applications in cellular communication networks and the like.

L'invention concerne un oscillateur à quartz commandé par un four de précision (OCXO) utilisant un signal de rétroaction de réglage qui, une fois mixé à un signal de référence provenant d'un oscillateur de référence stable, commande avec précision la génération d'un signal de sortie provenant d'un oscillateur à quartz commandé par tension (VCXO). Un OCXO selon l'invention fait preuve d'une forte stabilité et d'une bonne précision. Le OXCO numérique peut être fabriqué à un coût modique et est spécialement indiqué pour des applications sur stations de base à accès multiple à répartition par code (AMCR) dans les réseaux de communication cellulaire et analogues.

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