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United States of America Patent

PATENT NO 20010055377
APP PUB NO 20010055377A1
SERIAL NO

09212718

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Abstract

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A ring detect/Caller I.D. detect circuit employs first and second operational amplifiers supplied with a differential input from the AC side of a diode bridge. The differential input is converted to a single ended input supplied in a first mode to a ring detect comparator supplied with a plurality of selectable reference voltages and in a second mode to a comparator which produces a digital Caller I.D. output signal. An impedance in the feedback loop of the first and second operational amplifiers is switch-selectable to enable the first and second modes of operation, and each of the selectable reference voltages is chosen to permit proper ring signal detection in a particular corresponding geography.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
CONEXANT SYSTEMS, INC.NEWPORT BEACH, CA461

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
BEUTLER, THOMAS GREY TUSTIN, CA 9 227
RAHAMIM, RAPHAEL ORANGE, CA 30 700
SACCA, FRANK WEST COVINA, CA 23 376

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