Ultra-compact CAM array based on single MTJ and operating method thereof
US12224009B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2022 |
| Grant date | Feb 11, 2025 |
| Priority date | — |
| Expiry date | Jul 31, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C11/1673
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Disclosed in the present invention is an ultra-compact CAM array based on a single MTJ and an operating method thereof. The CAM array comprises an M*N CAM core for storing contents, additional reference rows for storing “0” and “1” and reference columns for storing “0” and “1”, a row decoder, a column decoder, transmission gates ENs, write drivers WDs, search current sources Isearchs and two-stage detection amplifiers. The present invention utilizes 1T-1MTJ cells to construct the CAM array, and combines the advantages of the MTJ and CMOS. While ensuring search energy efficiency, a unique structure of the MTJ is utilized to implement a less area overhead and a lower search delay compared with a traditional CMOS-based CAM, and non-volatility is achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.