Write driver for a magnetoresistive memory
US6842365B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 5, 2003 |
| Grant date | Jan 11, 2005 |
| Priority date | — |
| Expiry date | Sep 5, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C11/1675
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A write driver uses a reference current that is reflected to a driver circuit by a voltage. The driver circuit is sized in relation to the device that provides the voltage so that the current through the driver is a predetermined multiple of the reference current. This voltage is coupled to the driver circuit through a switch. The switch is controlled so that the driver circuit only receives the voltage when the write line is to have write current through it as determined by a decoder responsive to an address. The driver is affirmatively disabled when the write line is intended to not have current passing through it. As an enhancement to overcome ground bounce due to high currents, the input to the driver can be capacitively coupled to the ground terminal that experiences such bounce. Additional enhancements provide benefits in amplitude and edge rate control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.