Transcription of CRYSTALS AND OSCILLATORS - NEL Frequency Controls, Inc.
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CRYSTALS AND OSCILLATORS - NEL Frequency Controls, Inc.
JL9113 Rev. C1 CRYSTALS AND OSCILLATORSBy Jerry A. LichterFrequency control devices are generally piezoelectric devices, electromechanical in nature. Mechanicalconsiderations (such as vibration, shock, and handling) of these devices are as important as electricalconsiderations. Frequency control is required in varied applications from microprocessor timing to radiostation transmission. Frequency control devices such as quartz CRYSTALS and OSCILLATORS are quite fragile. These devices should behandled much more carefully than most other components used in the electronic industry, even though thepackaging looks very and filters are usually discrete piezoelectric devices. OSCILLATORS incorporate a resonator alongwith an active device and several discrete components to produce a stand-alone Frequency control AND FILTERSR esonators and filters use the piezoelectric properties of various materials. The word piezoelectricity means"pressure-electricity".
JL9113 Rev. C 2 Series resonance crystals are generally used in crystal filters and resonator circuits which require no phase shift from the crystal in order to oscillate.
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