Current supply circuit for driving high capacitance load in an integrated circuit
US5134310A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jan 23, 1991 |
| Grant date | Jul 28, 1992 |
| Priority date | — |
| Expiry date | Jan 23, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C7/06
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A constant current power supply circuit for an integrated circuit memory which is well suited for driving a high capacitance load, such as a large number of sense amplifiers. A first circuit provides a constant current source and a second "current mirror" circuit provides an output current proportionate to the first circuit, but at a higher desired level of current. The constant current circuit is achieved using two cross-coupled FET transistors and two resistances such that the conductivity of each transistor is inversely related to the conductivity of the other. The circuit reaches a constant current equilibrium which is largely independent of operating voltage or load, but rather depends on the relative values of the components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.