SCR-DMOS circuit for driving electroluminescent displays
US4937647A · kind A · utility
18Cited by
5References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 14, 1988 |
| Grant date | Jun 26, 1990 |
| Priority date | — |
| Expiry date | Jul 14, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/567
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.