Design of a Long Period Measuring Electronic Instrument using a Phase-Locked Loop
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2014-01-15
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University of Hawaii at Manoa
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An electronic instrument capable of. measuring the period and the time of arrival of the peak of very long period nearly sinusoidal waveformswas designed. This design consists of an analog phase-locked loop device, which extracts the period in terms of a voltage and a digital counting device which establishes the voltage in a form for display on either an oscilloscope or a chart recorder. Tests show that this prototype instrument is capable of measuring periods between 10 to 300 seconds and also indicate the arrival time of the peak.
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45 pages
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