Device for measuring the phase angle between a sine wave signal

Details Device for measuring the phase angle between a sine wave signal Device for measuring the phase angle between a sine wave signal

1982-07-21

1985-03-19

Thomas, James D.

Boots, shoes, and leggings

324 83R, 340347SY, 364484, G06F 1531, G06G 722

Patent

active

045063338

ABSTRACT:
According to the invention, on the basis of a logic signal of frequency F a multiplier processes a signal of frequency 4F sampling a A/D converter, which supplies at its outputs the digital values and a bit representing the sign of sin .0. and cos .0.. These values, processed by a circuit, are restored by two registers, which supply the absolute values of A sin .0. and A cos .0.. These values are compared in a comparator and as a function of the ratio .vertline.sin .0..vertline./.vertline.cos .0..vertline. an inverting PROM and a multiplier calculate either .vertline.tan .0..vertline. or .vertline.cot .0..vertline.. The phase angle .0. is extracted by a PROM knowing .vertline.tan .0..vertline. or .vertline.cot .0..vertline. and the sine and cosine signs.

REFERENCES:
patent: 3602812 (1971-08-01), Paradise
patent: 3766545 (1973-10-01), Hikosaka
patent: 3829854 (1974-08-01), Brand et al.
patent: 3978287 (1976-08-01), Fletcher et al.
patent: 4075698 (1978-02-01), Lode

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