Compensated bias generator voltage source for ECL circuits
US4644249A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 25, 1985 |
| Grant date | Feb 17, 1987 |
| Priority date | — |
| Expiry date | Jul 25, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S323/907
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A voltage compensated bias generator voltage source includes an all NPN active collector load circuit operatively coupled between the line voltage V.sub.cc and the collector of the shunt regulator transistor of the bias generator. The all NPN active collector load circuit logarithmically reduces variation in shunt regulator transistor collector current with variations in the line voltage V.sub.cc. A transistor of the active collector load circuit also provides in combination with an output transistor of the bias generator a Darlington transistor pair of ECL current source voltage V.sub.cs. A temperature variation countervailing third transistor is also operatively coupled in the active collector load circuit to compensate for temperature variation problems introduced by the active collector load circuit itself. The temperature variation countervailing active collector load circuit actually reverses the effect of temperature on the shunt regulator transistor collector current for substantial linearizing of the dependence of bias generator outputs on temperature variation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.