Impedance measuring device

Details Impedance measuring device Impedance measuring device

1980-10-06

1983-09-13

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 60R, G01R 2700

Patent

active

044045174

ABSTRACT:
An impedance measuring device having a signal source (10) for providing a first signal (e1) having a given frequency, a given amplitude and a given waveform; a differentiation circuit (14) which includes an unknown impedance element, for differentiating the first signal and providing a second signal (e3); and a peak voltmeter (12) for measuring the unknown impedance element whose impedance value is proportional to an amplitude of the second signal and is displayed by the peak voltmeter.

REFERENCES:
patent: 2595675 (1952-05-01), Jaynes
patent: 2604511 (1952-07-01), Marzolf
patent: 2940037 (1960-06-01), Lide
patent: 3530379 (1970-09-01), Demerliac
patent: 3786349 (1974-01-01), Devenyi
patent: 3947760 (1976-03-01), Noguchi
Kameoka: "Measuring High-Value Capacitors"-hp Journal-3/72.
Maeda: ". . . 1 MHZ Digital LCR Meter"-hp Journal-3/74.
Avinor: "Measurements of L & C Over Nine Decodes"-Journal of Phys. & Sci. Instruments-Aug. 1977.
Maeda: "Multifreq. LCR Mtn . . . "-hp Journal-2/79.

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