Temperature compensated current sensing circuit
US4591743A · kind A · utility
14Cited by
3References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 19, 1983 |
| Grant date | May 27, 1986 |
| Priority date | — |
| Expiry date | Dec 19, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/302
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A metal resistor having a positive temperature coefficient of resistance is connected to a current source to develop a voltage drop that acts as an offset for a .DELTA.V.sub.BE differential amplifier. Since this offset voltage has a positive temperature coefficient it will compensate the resistor coefficient to develop a constant current. The constant current can be employed in a current sink sense-shutoff combination or it can be used to develop a plural output current source/sink combination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.