US Patent Application No: 2001/0055,377

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TELEPHONE LINE ON-HOOK EVENT DETECTOR

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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, CA624

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Beutler, Thomas Grey Tustin, CA 12 210
Rahamim, Raphael Orange, CA 39 643
Sacca, Frank 23036 Rio Lobos Rd., Diamond Bar, CA 91765 24 322

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