Four lead monolithic Darlingtons
US4259939A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 18, 1979 |
| Grant date | Apr 7, 1981 |
| Priority date | — |
| Expiry date | Sep 18, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2224/49175
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A monolithic Darlington in which the transistors forming the Darlington pair are formed on a substrate together with a fourth terminal in addition to the normal three terminals provided for a Darlington pair, the fourth terminal being connected to the base electrode of the second transistor and the emitter electrode of the first transistor. The addition of the fourth terminal enables a control circuit for controlling the rate of switch off to be connected between the fourth terminal and the command collector electrode, this removing the effect which the stored charge on the base electrode of the first transistor has on the switching rate of the Darlington pair, thus enabling a faster switching rate to be achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.