Transcription of QUARTZ CRYSTAL DESIGN NOTES - Crystal Oscillators
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QUARTZ CRYSTAL DESIGN NOTES - Crystal Oscillators
QUARTZ CRYSTAL . DESIGN NOTES . Series vs. Parallel Pullability "Series" resonant crystals are intended for use in circuits Pullability refers to the change in frequency of a CRYSTAL which contain no reactive components in the oscillator unit, either from the natural resonant frequency (Fr) to a feedback loop. "Parallel" resonant crystals are intended load resonant frequency (FL), or from one load resonant for use in circuits which contain reactive components frequency to another. See Figure 6. The amount of (usually capacitors) in the oscillator feedback loop. Such pullability exhibited by a given CRYSTAL unit at a given circuits depend on the combination of the reactive value of load capacitance is a function of the shunt components and the CRYSTAL to accomplish the phase shift capacitance (Co) and the motional capacitance (C1) of necessary to start and maintain oscillation at the specified the CRYSTAL unit.
106 FOXElectronics 5570 Enterprise Parkway Fort Myers, Florida 33905 USA +1(239)693-0099 FAX +1(239)693-1554 http://www.foxonline.com © 2004 FOX ELECTRONICS Figure 8 ...
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