Fast turn on switch circuit with parallel MOS controlled thyrist

Details Fast turn on switch circuit with parallel MOS controlled thyrist Fast turn on switch circuit with parallel MOS controlled thyrist

1993-04-26

1995-10-31

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Gating

Accelerating switching

327428, 327438, 327380, 257138, H03K 1704

Patent

active

054633443

ABSTRACT:
A fast turn-on electrical switch circuit includes a silicon controlled rectifier ("SCR") connected substantially in parallel with a MOS controlled thyristor ("MCT"). When the switch is turned on, the MCT turns on almost immediately and carries the circuit load during the spreading time of the SCR. The SCR subsequently carries the circuit load when it is turned fully on because it has a smaller forward drop, due in part to its larger area and/or higher carrier lifetime. The MCT and SCR may be gated simultaneously from the same or separate sources or the SCR may be gated with a portion of the current from the MCT. The switch may be integrated into a single semiconductor device with alternating MCT regions and SCR regions.

REFERENCES:
patent: 3743859 (1973-07-01), Exner
patent: 4130767 (1978-12-01), Okuhara et al.
patent: 4551643 (1985-11-01), Russell et al.
patent: 4672245 (1987-06-01), Majumdar et al.
patent: 5283463 (1994-02-01), Nguyen et al.

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