So, where does that leave the classic high-performance crystal oscillator
? The simple answer might be in high-performance applications where a "service call" is simply out of the question.
Considering the upper-mentioned, this article proposes a 16.384 MHz Voltage Controlled Crystal Oscillator
(VCXO) crystal oscillator
used as reference for time scheduling (16.384 MHz divided by 500 equals 32.768 Hz--the most commonly used frequency in clock and time applications) and as a frequency reference to one or more Phase Locked Loop (PLL) circuits responsible to generate the required frequencies.
[11.] Laurin, J.J., Zaky, S.G., and Balmain, K.G., "EMI-induced failures in crystal oscillators
," Electromagnetic Compatibility, IEEE Transactions on, 33(4):334-342, 1991.
In this mode, the DPLL output frequency will be based on crystal oscillators
used as the DPLL master clock.
The device includes a SmartPLL [TM] that multiplies a 25-MHz to 45-MHz fundamental crystal oscillator
frequency to more than 20 of the most common reference frequencies used in high-speed serial data interfaces.
Pericom Semiconductor Corporation (Nasdaq:PSEM), a preferred supplier of products for timing, signal conditioning and serial connectivity, has announced the releases of the M-Series Spread Spectrum Crystal Oscillator
The PN9276 includes a microwave mixer and a low-noise, YIG-based, 100-MHz step synthesizer that generates a 4-GHz to 9-GHz signal from a 100-MHz crystal oscillator
phase-locked to a 10-MHz crystal oscillator
The model 5100 is a digital indirectly compensated crystal oscillator
(DICXO) that provides a pure, ultra-clean, crystal-controlled radio frequency signal for applications where elimination of jitter, microjumps, perturbations and frequency "pops" is critical in a non-ovenized crystal oscillator
ON Semiconductor extended its silicon based crystal oscillator
(X0) clock module range.
The device incorporates crystal oscillator
(XO) circuitry with a fully-integrated frequency synthesiser supporting a wide output frequency range from 10.9 MHz up to 766.7 MHz and from 875.2 MHz up to 1175 MHz.
A group of Electronic Engineering Technology Program students from Pittsburg State University has developed a method to test the acceleration-induced frequency sensitivity of a crystal oscillator
as a precursor to designing an acceleration compensation system for the oscillator.