G - Physics – 01 – R
Patent
G - Physics
01
R
324/43
G01R 27/26 (2006.01) G01R 17/02 (2006.01) G01R 17/10 (2006.01)
Patent
CA 1184975
TITLE A FREQUENCY COMPENSATOR FOR A CURRENT-COMPARATOR CAPACITANCE BRIDGE INVENTOR Eddy So ABSTRACT OF THE DISCLOSURE A method and apparatus for rendering a high-voltage current- comparator capacitance bridge insensitive to frequency fluctuations when used for measuring inductance. A compensating current, proportional to twice the change in the current through the reference capacitor due to frequency fluctuations a is driven into the first comparator winding, through which the current from the reference capacitor passes, resulting in a current in that winding having frequency characteristics similar to those of the current passing through the second winding, which is con- nected to the inductance. This compensating current is derived from a reduced replica of the applied high-voltage or from the current through the reference capacitor.
419280
National Research Council Of Canada
Rymek Edward
LandOfFree
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