Mask-programmable logic device with programmable portions
US7064580B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2004 |
| Grant date | Jun 20, 2006 |
| Priority date | — |
| Expiry date | Dec 2, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D84/90
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A mask-programmable logic device includes some circuitry that is electrically programmable as in conventional programmable logic devices. This allows a user to adjust certain characteristics of programmed devices whose logic functions have been proven and need not change, but which operate in an environment that changes, necessitating different characteristics, without having to redesign the programming metallization layers, and therefore without involving the device manufacturer. The programmable elements may include input/output elements, which may need adjustment because the signal characteristics of the larger system change, or clock circuitry, which may need adjustment because environmental conditions such as changes in the expected operating temperature may affect clock signals in the larger system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.