Capacitor test apparatus and method

Details Capacitor test apparatus and method Capacitor test apparatus and method

1974-12-30

1976-03-09

Krawczewicz, Stanley T.

Electricity: measuring and testing

Conductor identification or location

Inaccessible

G01R 2726

Patent

active

039434397

ABSTRACT:
A method and apparatus for the high-speed testing of capacitors. A computing amplifier is connected with the capacitor under test to form an integrator which integrates a known excitation signal. The integration is initiated with no charge stored by the capacitor and at a zero crossing of the excitation signal. The integration occurs over a period which produces the maximum voltage across the capacitor. A peak detector measures the maximum voltage across the capacitor to produce a peak detection voltage inversely proportional to the value of the capacitor and directly proportional to a predetermined nominal value of the capacitor. The reciprocal of the output from the peak detector is formed to provide a measurement directly proportional to the capacitor value and inversely proportional to the nominal value of the capacitor.

REFERENCES:
patent: 3325727 (1967-06-01), Haas
patent: 3370229 (1968-02-01), Hamburger et al.

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