Noise removal circuit for use in a partial discharge measuring d

Details Noise removal circuit for use in a partial discharge measuring d Noise removal circuit for use in a partial discharge measuring d

1985-09-26

1987-12-01

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Transient or portion of cyclic

324 77H, 455304, G01R 1900, G01R 2316, H04B 110

Patent

active

047107057

ABSTRACT:
A noise removal circuit for use in partial discharge measuring device of a high voltage apparatus. The circuit includes a first phase shift/reduction device responsive to an input signal for passing it directly while delaying it by a predetermined time and for reducing the delayed signal from the directly passed signal a second phase shift/reduction device for passing an output of the first phase shift/reduction device directly while delaying the output by the predetermined time and for reducing the delayed signal from the directly passes signal, and a phase shift/multiplying device for directly passing an output signal of the second phase shift/reduction device while delaying it by a time twice the predetermined time and multiplying the directly passed signal with the delayed signal.

REFERENCES:
patent: 2799734 (1957-07-01), Camp

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