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Priority to JP7364377ApriorityCriticalpatent/JPS548565A/en
Publication of JPS548565ApublicationCriticalpatent/JPS548565A/en
Publication of JPS575468B2publicationCriticalpatent/JPS575468B2/ja
Measurement Of Mechanical Vibrations Or Ultrasonic Waves
(AREA)
Abstract
PURPOSE:To perform detecting of basic frequencies highly accurately with a simple constitution by converting a.c. signal to basic wave containing pulse signals with a peak holding circuit and a comparator.