Turning to Digital Crystals in GSM TransceiversTurning to Digital Crystals in GSM TransceiversVC-TCXO modules bring a size and cost penalty to next-generation GSMhandset designs. Fortunately, DCXOs architectures are emerging that willaddresses size and cost concerns in mobiles.Today, most GSM handsets use voltage-controlled, temperature-compensatedcrystal oscillator (VC-TCXO) modules as the system reference oscillator. Toestablish and maintain a robust wireless connection, the referenceoscillator must attain high levels of precision and accuracy.Since accuracy over time is critical in a wireless phone design, thereference oscillator must be able to compensate for both static and dynamicerrors. VC-TCXO modules meet these requirements through analog techniquesto correct frequency devi……
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