Vehicle locating unit with input voltage protection
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United States of America Patent
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Mar 31, 2009
Issued Date -
N/A
app pub date -
May 18, 2005
filing date -
May 18, 2005
priority date (Note) -
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Abstract
A vehicle locating unit with a receiver for receiving a signal from a network of communication sources, a transponder activated when a communication source sends a message to the receiver, and a power supply regulating circuit for regulating a nominal input voltage and powering the receiver and the transponder. A protection circuit is responsive to an injected input voltage and configured to clamp the injected (high level) input voltage at a predetermined maximum voltage.
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Family
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