Trimmable current source
US4736126A · kind A · utility
6Cited by
5References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 24, 1986 |
| Grant date | Apr 5, 1988 |
| Priority date | — |
| Expiry date | Dec 24, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S323/907
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A JFET circuit generates an adjustable current having a temperature coefficient proportional to I.sub.DSS where I.sub.DSS is the drain current of a JFET when its source and gate are shorted. The JFET has a source terminal coupled to a source of supply voltage. An adjustable resistor is coupled between the gate and source terminals of the JFET. A reference current is supplied to the resistor, which reference current is proportional to the JFET's pinch-off voltage. The desired current appears at the drain of the JFET.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.