Method and apparatus for measuring the capacitance of telephone

Details Method and apparatus for measuring the capacitance of telephone Method and apparatus for measuring the capacitance of telephone

1975-11-28

1977-06-28

Krawczewicz, Stanley T.

Electricity: measuring and testing

Conductor identification or location

Inaccessible

324 52, G01R 2726

Patent

active

040328414

ABSTRACT:
Improved method and apparatus for measuring the capacitance of telephone cable pairs utilizes the technique of charging and discharging the cable pair being measured to respective predetermined voltage levels and integrating the discharge current while observing certain specified parameter requirements. This technique provides an output which is a linear function of the capacitance of the cable pair being measured and has the property of substantially infinite rejection of a predetermined (interference) frequency and its harmonics, and yet permits the apparatus to have requisite simplicity and economy.

REFERENCES:
patent: 2208655 (1940-07-01), Wright
patent: 3452272 (1969-06-01), Collins et al.

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