Apparatus for monitoring two electric quantities by combining th

Details Apparatus for monitoring two electric quantities by combining th Apparatus for monitoring two electric quantities by combining th

1976-10-21

1978-02-21

Morrison, Malcolm A.

Boots, shoes, and leggings

324 76R, 328151, 340248R, 364736, G06F 1520, G01R 1302

Patent

active

040756971

ABSTRACT:
Apparatus for monitoring two sinusoidal electric quantities of a common period, comprises two similarly timed samplers, an arithmetic unit for combining, in accordance with a preselected relation, three consecutive samples of each electric quantity so as to produce an output signal which is independent of time and phase relations between the sampling pulses and the respective quantities. The output signal may be determined solely by peak values of the respective quantities, phase difference between the electric quantities, and timing period. The apparatus further comprises a discriminator circuit having a reference level and responsive to the output signal for producing a signal for use in monitoring the electric quantities.

REFERENCES:
patent: 3758763 (1973-09-01), Nohara et al.
patent: 3795008 (1974-02-01), Kolsrud et al.
patent: 4006348 (1977-02-01), Ochiai et al.

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