Ferroelectric simulator, ferroelectric method of manufacture, and method of simulation
US5867405A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1996 |
| Grant date | Feb 2, 1999 |
| Priority date | — |
| Expiry date | Mar 1, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F30/367
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for simulating the design of a ferroelectric circuit uses a processor (501). The processor (501) executes a simulator (540) from memory (538) to exercise a ferroelectric model (544). The ferroelectric model (544) keeps track of turning points or extrema points (FIGS. 11-17) in a history data file (542). This history data in file (542) is then used with eqs. 3-11 herein to curve model between voltage/charge history points from the file (542) and a current operating voltage/charge point of the ferroelectric device. This curve modeling effectively and efficiently determines the charge stored in a ferroelectric capacitor (FIGS. 7 or 8) as voltage across the ferroelectric capacitor is varied over time and temperature. History data points are selectively removed from the data file (542) to maintain and enable time-efficient determination of charge (Q) in the ferroelectric device over time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.