Circuit for protecting electronic equipment from overvoltage or overcurrent conditions
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United States of America Patent
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Feb 27, 1996
Issued Date -
N/A
app pub date -
Jun 14, 1994
filing date -
Aug 21, 1989
priority date (Note) -
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Abstract
A circuit for protecting a semiconductor circuit or a telephone communication line from a lightning surge or overvoltage or overcurrent condition. The circuit incorporates a two-terminal surge absorbing device arranged in parallel with the circuit or line to be protected, a thermistor having a high positive temperature coefficient, arranged in series to the circuit or line, between the electric source and the surge absorbing means, and a resistor connected in series with the circuit or line.
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