Voltage clamp circuit and method
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United States of America Patent
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Jul 2, 1996
Grant Date -
N/A
app pub date -
Sep 12, 1994
filing date -
Sep 12, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An active clamp circuit for controlling over-voltage, surge conditions in electrical circuits. The active clamp includes a varistor which is switched into a circuit by a high power switch upon the detection of a surge condition. The use of a MOS Controlled Thyristor ('MCT') as a means for the switching the varistor permits the circuit to withstand a high di/dt and surge current while maintaining both on and off gated control of the switch.
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