PTAT current source
US5646518A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1994 |
| Grant date | Jul 8, 1997 |
| Priority date | — |
| Expiry date | Nov 18, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S323/907
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Briefly, in accordance with one embodiment of the invention, a current source comprises: a first and a second current path, the current paths being coupled so as to provide, during circuit operation, first and second currents through the respective current paths in a substantially predetermined direct proportion. The current source further includes an operational amplifier having its respective input terminals coupled to the first and second current paths, the operational amplifier being coupled in a feedback configuration so as to maintain substantially equal voltages between a first and second predetermined point respectively located along the first and second current paths. Furthermore, the respective first and second currents are related to the respective first and second voltages substantially in accordance with the junction diode equation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.