Mark-space amplitude modulator for measuring reactive power cons

Details Mark-space amplitude modulator for measuring reactive power cons Mark-space amplitude modulator for measuring reactive power cons

1983-11-23

1986-06-10

Myracle, Jerry W.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Plural inputs

307262, 307512, 364703, 364842, G01R 2106, G01R 21133

Patent

active

045945470

ABSTRACT:
An apparatus for determining the reactive energy of a circuit includes a mark-space modulator, which has an input terminal normally accepting a first signal input, and an output terminal, a pulse amplitude modulator which has a bipolar modulating terminal normally accepting a second and bipolar signal input, a signal output terminal, and a pulse input terminal, and a delay circuit which has a data input terminal connected to the output terminal of the mark space modulator, and which has an output terminal connected to the pulse input terminal of the pulse amplitude modulator. A predetermined phase angle at an operating frequency of the delay circuit normally occurs between the input terminal and the output terminal of the delay circuit. A regulator is interconnected between the mark-space modulator and the delay circuit so as to maintain the phase angle at the operative frequency as close as possible to 90 degrees, even when the signal input is subject to any level variations or to any interference.

REFERENCES:
patent: 3626308 (1971-12-01), Paine
patent: 3849671 (1974-11-01), Molack
patent: 3983498 (1976-09-01), Malek
patent: 4166249 (1979-08-01), Lynch
patent: 4363002 (1982-12-01), Fuller
patent: 4404428 (1983-09-01), Hirata et al.
patent: 4408283 (1983-10-01), Kovalchik et al.
Uzunoglu, V., "Build a Linear-IC Phase-Locked Loop", Electronic Design, vol. 10, May 9, 1968, pp. 90-93.

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