Electronic switch
US4612448A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 4, 1985 |
| Grant date | Sep 16, 1986 |
| Priority date | — |
| Expiry date | Feb 4, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/567
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Connected in series with a thyristor (1) are two IGFETs (2, 3) one to the anode side and the other to the cathode side. Between the inner thyristor zones (6, 8) and the outer IGFET connections, a threshold circuit (10, 11) is connected to each. The threshold voltage of the threshold circuit is higher than that of the p-n junctions between the outer and adjacent inner thyristor zones (6, 7; 8, 9) including the voltage drop of the conducting IGFET. The switch is turned off by operating to turn off the IGFETs. The current then flows via the threshold elements through the two inner zones (6, 8). The charge carriers of this diode are evacuated very quickly, since carrier injection from the outer zones is no longer possible.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.