Analog content addressable memory and method of operation thereof

By using floating gate memory technology in content-addressable memory, connecting N-type and P-type channel floating gate devices in series or parallel, and setting the matching range, the problem of low efficiency in analog content search in the prior art is solved, and efficient analog content recognition is achieved.

CN115394339BActive Publication Date: 2025-11-07MACRONIX INTERNATIONAL CO LTD
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Patent Information

Application Number
CN202110589025.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2021-05-20
Filing Date
2021-05-28
Publication Date
2025-11-07
Estimated Expiration
2041-05-28

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Abstract

The present disclosure provides an analog content addressable memory (analog CAM) and an operating method thereof. The analog CAM includes a match line, an analog CAM memory cell, and a sensing circuit. Each analog CAM memory cell includes a first floating gate device having an N-type channel and a second floating gate device having a P-type channel. The first floating gate device and the second floating gate device are programmed to set a match range. The sensing circuit is connected to the match line. When an input signal falls within the match range, a voltage of the match line is pulled down to a predetermined level or below the predetermined level, and the sensing circuit outputs a match success result.
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Citation Information

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