Protective circuit
US7848069B2 · kind B2 · utility
2Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 22, 2008 |
| Grant date | Dec 7, 2010 |
| Priority date | — |
| Expiry date | Feb 28, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H9/046
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A protective circuit connected between a terminal of a semiconductor integrated circuit and ground (GND), comprises: a first diode having an anode connected to the terminal of the semiconductor integrated circuit; a second diode having an anode connected to GND and a cathode connected to the cathode of the first diode; a transistor having a collector or drain connected to the terminal of the semiconductor integrated circuit, and an emitter or source connected to GND; and at least one third diode connected in series in a forward direction from the cathode of the first diode toward the base or gate of the transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.