SCR-DMOS circuit for driving electroluminescent displays

Details SCR-DMOS circuit for driving electroluminescent displays SCR-DMOS circuit for driving electroluminescent displays

1988-07-14

1990-06-26

Jackson, Jr., Jerome

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Plural load device systems

357 38, 357 46, 357 234, 357 48, 3151693, H01L 2974, H01L 2978

Patent

active

049376470

ABSTRACT:
Disclosed is a small-area solid state driver (30) adapted for switching high voltages. The driver (30) includes a DMOS device (48) driving a bipolar SCR (58). A SCR NPN transistor (54) and PNP transistor (56) are parasitic in nature, thus reducing the wafer area of the driver (30). The SCR (58) provides current sink capabilities to the driver output (60). Current source capabilities are provided by a substrate input terminal (50) which is connected to the output (60) by diodes (84, 86). A third input (52) allows the SCR (58) to be disabled.

REFERENCES:
patent: 4456909 (1984-06-01), Takahara
patent: 4502070 (1985-02-01), Leipold
patent: 4550332 (1985-10-01), Wagner
patent: 4551643 (1985-11-01), Russell et al.
patent: 4605872 (1986-08-01), Rung

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