Dynamic adjusting reference voltage for ferroelectric circuits
US5218566A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 15, 1991 |
| Grant date | Jun 8, 1993 |
| Priority date | — |
| Expiry date | Aug 15, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C11/22
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A reference voltage circuit used for determining the polarization state of a ferroelectric capacitor. The circuit includes a pair of ferroelectric capacitors, each polarized to an opposite polarization state. The charge stored in each ferroelectric capacitor is discharged into respective sense capacitors, thereby generating different voltages, each representative of the different polarization states. The sense capacitors are then short circuited together to thereby average the representative voltages and provide a reference voltage that is of intermediate value. The reference voltage can then the used to compare memory cell signals generated by other ferroelectric capacitors to determine the respective polarization states.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.