Method and means for increasing the frequency of update of direc

Details Method and means for increasing the frequency of update of direc Method and means for increasing the frequency of update of direc

1984-11-14

1987-01-13

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307525, 328133, 324165, 340672, H03K 112, H03L 700

Patent

active

046366628

ABSTRACT:
A method and means are provided for increasing the frequency of update of direction information contained in two essentially identical alternating current signals, essentially sinusoidal in waveform, and in quadrature. Eight electrical signals having rectangular waveforms are generated from the two primary signals. The eight signals are differentiated and the eight derivatives combined with the eight signals into two sets of eight additive pairs each, with a high level logic signal from one set indicating one direction and a high level logic signal from the other set indicating the opposite direction. The direction information is updated eight times during each full cycle of each of the two primary signals.

REFERENCES:
patent: 3517322 (1970-06-01), Lay
patent: 3710265 (1973-01-01), Gray
patent: 3840817 (1974-10-01), Seki

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