Load circuit for testing USB ports
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United States of America Patent
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Sep 2, 2014
Grant Date -
Aug 29, 2013
app pub date -
Jul 18, 2012
filing date -
Feb 27, 2012
priority date (Note) -
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Abstract
An exemplary load circuit includes a switch unit and a current dividing circuit. The switch unit includes a number of switches. The current dividing circuit includes a number of sub-circuits. A terminal of a resistance module of each of the sub-circuits is connected to both a power terminal and a terminal of a corresponding one of the switches. The other terminal of the resistance module of each of the sub-circuits is connected to a drain of a transistor of each of the sub-circuits. A source of the transistor is connected to ground. A gate of the transistor is connected to ground, and is also connected to another terminal of the corresponding switch.
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