Reference circuit for high speed integrated circuits
US5304918A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 22, 1992 |
| Grant date | Apr 19, 1994 |
| Priority date | — |
| Expiry date | Jan 22, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S323/907
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A reference circuit for supplying current to high speed logic elements in an integrated circuit supplies less current when circuit temperature decreases while a supply voltage remains constant. The reference circuit supplies less current when the supply voltage increases while circuit temperature remains constant. A resistance with a temperature coefficient, in some embodiments a negative temperature coefficient, is used to decrease current flow in a first leg of an output mirror when temperature decreases. A feedback circuit is used to decrease current flow in the first leg of the output current mirror when the feedback circuit senses an increase in supply voltage by sensing a voltage change on a common control node of the output current mirror. The reference circuit sees many applications including supplying current to logic gates, input/output buffers, and sense amplifiers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.