US 12,094,534 B2
Content addressable memory device, content addressable memory cell and method for single-bit multi-level data searching and comparing
Yu-Hsuan Lin, Taichung (TW); and Po-Hao Tseng, Taichung (TW)
Assigned to MACRONIX INTERNATIONAL CO., LTD., Hsinchu (TW)
Filed by MACRONIX INTERNATIONAL CO., LTD., Hsinchu (TW)
Filed on Sep. 1, 2023, as Appl. No. 18/459,461.
Application 18/459,461 is a continuation of application No. 17/717,192, filed on Apr. 11, 2022, granted, now 11,790,990.
Claims priority of provisional application 63/302,992, filed on Jan. 25, 2022.
Prior Publication US 2023/0410904 A1, Dec. 21, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G11C 15/04 (2006.01); G11C 7/14 (2006.01)
CPC G11C 15/046 (2013.01) [G11C 7/14 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A data search method for a content addressable memory (CAM) cell including a first memory cell and a second memory cell coupled to each other, the method comprising:
storing a storage data in the first memory cell and the second memory cell of the CAM cell; and
receiving, by the first memory cell and the second memory cell, a first search voltage and a second search voltage representing a search data to perform data searching on the CAM cell by the search data;
wherein the storage data is a single-bit multi-level storage data and/or the search data is a single-bit multi-level search data.