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crystal oscillator
(redirected from watch crystal)

   Also found in: Dictionary/thesaurus, Wikipedia, Hutchinson 0.04 sec.

crystal oscillator

An oscillator that uses a quartz crystal to generate a frequency. Such devices generally output a fixed frequency, but some can be controlled by a tuning voltage over a small range. Contrast with VCO.



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768kHz watch crystal provides the low-power clock, while a 5MHz crystal provides the high speed clock, providing a 25MHz internal system clock from the on-chip PLL.
The ElanSC400 microcontroller features an integrated power management unit (PMU), five phase lock loops which generate all system clocks from a 32-Khz watch crystal, and fully static design for maximum battery life.
By the turn of the century, this technology may run on the surface of a watch crystal," said John Seybold, PhD.
 
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