Current source regulator
US4958122A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 18, 1989 |
| Grant date | Sep 18, 1990 |
| Priority date | — |
| Expiry date | Dec 18, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/225
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A current source regulator is responsive to an enable signal and provides at least one output current of predetermined magnitude proportional to absolute temperature. The enable signal biases a first transistor for supplying current through its collector-emitter conduction path to the common base of a string of PNP transistors, the latter of which provide the output current. The current flowing in one of the PNP transistors flows through a regulating feedback circuit, the output of which regulates the base voltage of the first transistor to control the base voltage of the PNP transistors for maintaining the current flowing through the regulating feedback circuit at the predetermined value proportional to absolute temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.