Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1979-03-22
1981-09-15
Karlsen, Ernest F.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
324 59, 324 61R, 324 65R, G01R 2726, G01R 2702
Patent
active
042900085
ABSTRACT:
An apparatus and method for determining electrical characteristics of an object wherein the phase difference between an input signal to and an output signal from a measuring circuit containing the object is maintained constant. Properties of the object are determined by monitoring the output of the measuring circuit of an amplitude signal related to the resistance of the object and by monitoring the output of the measuring circuit for an amplitude signal and a frequency signal related to the reactive impedance of the object.
REFERENCES:
patent: 3970925 (1976-07-01), Procter et al.
Hoshino Yoshikazu
Shuto Masayoshi
Karlsen Ernest F.
Shionogi & Co. Ltd.
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