Ultra-compact CAM array based on single MTJ and operation method thereof

• Main Authors: YIN XUNZHAO, YANG ZEYU, ZHUO CHENG
• Format: Patent
• Language: Chinese; English
• Published: 09.09.2022
• Subjects: INFORMATION STORAGE; PHYSICS; STATIC STORES

The invention discloses an ultra-compact CAM array based on a single MTJ and an operation method thereof. The CAM array comprises M * N CAM cores for storing contents, additional reference rows for storing '0' and '1', reference columns for storing '0' and '1', a row decoder, a column decoder, a transmission gate EN, a write-in driver WD, a search current source Isearch and a two-stage detection amplifier. The CAM array is constructed by adopting 1T-1MTJ units, the advantages of the MTJ and the CMOS are combined, under the condition that the search energy efficiency is ensured, less area overhead and lower search time delay are realized compared with the traditional CAM based on the CMOS by utilizing the unique structure of the MTJ, and the non-volatility is realized; according to the invention, a two-stage detection amplifier and a segmented design scheme are also adopted to further improve the reliability of search and the expandability of the CAM array. 本发明公开了一种基于单个MTJ的超紧凑CAM阵列及其操作方法，CAM阵列包括存储内容的M*N CAM核、额