Solid state current sensing circuit and protection circuit
US5008586A · kind A · utility
32Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 27, 1989 |
| Grant date | Apr 16, 1991 |
| Priority date | — |
| Expiry date | Jan 27, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/523
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A current sensing circuit for sensing a main current flowing through a power semiconductor element or elements, by utilizing a second current which is small in magnitude compared to the main current and varies depending on the main current, and sensing the second current through a current mirror circuit as a bias current of a differential circuit, and a function of sensing the temperature of the semiconductor element being afforded to the current sensing circuit through selection of a bias voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.