High accuracy current source and high accuracy transconductance stage
US4879520A · kind A · utility
4Cited by
3References
34Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 27, 1988 |
| Grant date | Nov 7, 1989 |
| Priority date | — |
| Expiry date | Oct 27, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/343
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A current source including a correction circuit configured as a secondary current source for adding current to the output as a function of base current of a primary transistor current source and increase impedance level of the output terminal by adding incremental current to the output terminal equal to the incremental current of the primary transistor current source to cancel the effect of the primary transistor current source on output impedance. The improved current source also improves the performance of a current mirror or pulley and a differential to single-ended current converter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.