Guarded electronic circuit from reversal of its supply battery polarity
US4958251A · kind A · utility
15Cited by
1References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 23, 1989 |
| Grant date | Sep 18, 1990 |
| Priority date | — |
| Expiry date | Jun 23, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H11/003
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A guarded electronic circuit from reversal of its supply battery polarity comprises a MOS power transistor connected between one pole of the battery and ground, to drive an electric load to ground, and a second, protection MOS transistor connected between the pole and the first transistor; said transistors, which are both provided with respective inherent diodes between the source and the drain, have their related drain electrodes connected together. The resulting circuit is self-protected against possible reversal of the polarity of the battery to which it is connected, and can protect the electric load driven thereby.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.