Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Using radiant energy
Patent
1995-12-26
1998-10-06
Nguyen, Vinh P.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Using radiant energy
379379, G01R 3100
Patent
active
058182160
ABSTRACT:
A minimally invasive detection circuit for determining whether a current flow is present in an electrical conductor, such as a telephone line, without appreciably loading the conductor. A load is placed in series with the conductor to generate a voltage drop when current flows therethrough. The voltage drop is detected by powered components that provide a signal, across an electrical isolation barrier, to an electrically isolated output. The powered components are powered by a voltage source that is on the isolated or remote side of the isolation barrier and whose voltage output is provided to the powered components across the isolation barrier so as to maintain electrical isolation between the powered components and the output and thereby avoid unnecessary loading of the conductor.
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Kobert Russell M.
Lucent Technologies - Inc.
Nguyen Vinh P.
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