Active solid-state devices (e.g. – transistors – solid-state diode – Regenerative type switching device – Bidirectional rectifier with control electrode
Patent
1996-09-11
1998-05-05
Ngo, Ngan V.
Active solid-state devices (e.g., transistors, solid-state diode
Regenerative type switching device
Bidirectional rectifier with control electrode
257121, 257123, 257124, 257133, 257146, 257175, 327326, 327344, 327381, 327421, 327428, 327584, H01L 2974, H01L 31111
Patent
active
057478368
ABSTRACT:
A dV/dt clamp circuit is connected to a base of a phototransistor for triggering a control electrode of a thyristor, thereby making an attempt to prevent an operation error. A control electrode voltage of the thyristor is applied to the gate of the MOSFET via a high breakdown voltage capacitor. The gate electrode voltage of the MOSFET can be continuously held at a threshold value or more by adjusting a zener voltage of a zener diode and a resistance value of a resistor. Since with a high dV/dt the MOSFET can be operated at a high speed to allow conduction between the drain and source of the MOSFET, the phototransistor does not trigger the thyristor, thereby preventing an operation error.
REFERENCES:
patent: 4047054 (1977-09-01), Ahmed
patent: 4535251 (1985-08-01), Herman et al.
patent: 4768075 (1988-08-01), Broich et al.
patent: 4959556 (1990-09-01), Dekker et al.
patent: 5424563 (1995-06-01), Temple et al.
Ngo Ngan V.
Sharp Kabushiki Kaisha
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