Electrical measurement and noise suppression

Details Electrical measurement and noise suppression Electrical measurement and noise suppression

1976-04-12

1979-08-07

Rolinec, Rudolph V.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Nonlinear

324120, 328144, 328163, G01R 1510, H04B 104

Patent

active

041639405

ABSTRACT:
Electrical noise is suppressed on an input signal by squaring the input signal and any noise thereon, removing the sinusoidal terms in the squared output (as by averaging), subtracting the d.c. noise component, and taking the square root of the remainder, so as to produce an r.m.s. dependent, substantially noise free output. If desired, the noise suppression circuitry may be combined in a low signal measuring instrument in which the input signal is repetitively sampled and freed of noise in the manner described, the output then being measured on a d.c. meter.

REFERENCES:
patent: 2881379 (1959-04-01), Logan, Jr.
patent: 3257616 (1966-06-01), Andrushkiw et al.
patent: 3423578 (1969-01-01), Platzer, Jr. et al.
patent: 3619794 (1971-11-01), Richman
patent: 3955139 (1976-05-01), Jenkins et al.

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