Device for measuring the phase angle between a sine wave...

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

G - Physics

01

R

324/33

G01R 25/00 (2006.01) H04N 5/04 (2006.01)

Patent

CA 1192954

ABSTRACT OF THE DISCLOSURE 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/N converter, which supplies at its outputs the digital values and a bit representing the sign of sin ? and cos ?. These values, processed by a circuit, are restored by two registers, which supply the absolute values of A sin ? and A cos ?. These values are compared in a comparator and as a function of the ratio ?sin ?? / ?cos ?? an inverting PROM and a multiplier calculate either ?tg ?? or ?cotg ?¦ . The phase angle ? is extracted by a PROM knowing ?tg ?¦ or¦cotg ?¦ and the sine and cosine signs.

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