Michael Moyal resumes & CV records
Resumes
Michael Moyal
Michael Moyal
Michael Z Moyal, 70PO Box 931, La Conner, WA 98257
Michael Moyal Phones & Addresses
La Conner, WA
Austin, TX
Mentions for Michael Z Moyal
Publications & IP owners
Us Patents
Integrated Ring Sensor With Fault Detection
US Patent:
5809109, Sep 15, 1998
Filed:
Jun 1, 1995
Appl. No.:
8/457668
Inventors:
Michael Moyal - Austin TX
Walter S. Schopfer - Austin TX
Walter S. Schopfer - Austin TX
Assignee:
Advanced Micro Devices, Inc. - Sunnyvale CA
International Classification:
H04M 124
US Classification:
379 22
Abstract:
A power cross circuit detects a ring trip condition in order to switch a pair of switch relays to a protection circuit and to appropriate line driver circuitry to enable a talking condition for a telephone. The power cross circuit detects a rise in a DC current across a feed resistor connected to a ring bus and a ring line. The power cross circuit determines a difference in current passing across a first and second sense amplifier connected to respective ends of the feed resistor. The current difference is then converted to a voltage difference, and utilized by the power cross circuit to output a power cross condition when the current difference exceeds a predetermined value.
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