Active solid-state devices (e.g. – transistors – solid-state diode – Regenerative type switching device – Combined with field effect transistor
Reexamination Certificate
2005-11-15
2005-11-15
Wilson, Christian (Department: 2891)
Active solid-state devices (e.g., transistors, solid-state diode
Regenerative type switching device
Combined with field effect transistor
C257S133000, C257S137000
Reexamination Certificate
active
06965131
ABSTRACT:
A semiconductor switch includes a thyristor and a current shunt, preferably a transistor in parallel with and controlled by the thyristor, which shunts thyristor current at turn-off. The thyristor includes a portion of a drift layer, with a p-n junction formed below a gate adjacent to the drift layer to establish a depletion region with a high potential barrier to thyristor current flow at turn-off. The drift layer also provides the transistor base, as well as a current path allowing the transistor base current to be controlled by the thyristor. The switch is voltage controlled using an insulated gate.
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Kaushik Rajashekara,Power Semiconductor Devices, The Electrical Engineering Handbook, Richard C. Dorf, CRE Press, pp. 763-769, 1997.
Koppel, Jacobs Patrick & Heybl
Rockwell Scientific Licensing LLC
Wilson Christian
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