Patent ID: 11967378
Assignee: MACRONIX INTERNATIONAL CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. An analog content addressable memory (CAM) device including:
a plurality of analog CAM cells, the analog CAM cells storing a plurality of analog storage data, wherein the plurality of analog storage data of the analog CAM cells are corresponding to into a plurality of match ranges, the match ranges are determined based on a plurality of first threshold voltages and a plurality of second threshold voltages of the analog CAM cells;
an electrical characteristic detection circuit coupled to the analog CAM cells; and
a sensing amplifier, coupled to the analog CAM cells, the match ranges of the analog CAM cells are adjusted by adjusting a current sensing level of the sensing amplifier,
wherein
in data searching, an analog search data is converted into a first analog search voltage and a second analog search voltage;
the first analog search voltage and the second analog search voltage are compared with the match ranges of the analog CAM memory cells,
the analog CAM memory cells generate a plurality of memory cell currents, and
the electrical characteristic detection circuit detects the memory cell currents to generate a plurality of sensing results, or the electrical characteristic detection circuit detects a plurality of match line voltages on a plurality of match lines coupled to the analog CAM memory cells to generate the plurality of search results.