A Content-Addressable Memory Using  Switched Diffusion Analog Memory with Feedback Circuit

Tomochika HARADA; Shigeo SATO; Koji NAKAJIMA

A Content-Addressable Memory Using "Switched Diffusion Analog Memory with Feedback Circuit"

Tomochika HARADA, Shigeo SATO, Koji NAKAJIMA

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For the purpose of realizing a new intelligent system and its simplified VLSI implementation, we propose a new nonvolatile analog memory called "switched diffusion analog memory with feedback circuit (FBSDAM). " FBSDAM has linear writing and erasing characteristics. Therefore, FBSDAM is useful for memorizing an analog value exactly. We also propose a new analog content-addressable memory (CAM) which has neural-like learning and discriminating functions which discriminate whether an incoming pattern is an unknown pattern or a stored pattern. We design and fabricate the CAM using FBSDAM by means of the 4µm double-poly single-metal CMOS process and nonvolatile analog memory technology which are developed by us. The chip size is 3.1 mm3.1 mm. We estimate that the CAM is composed of 50 times fewer transistors and requires 70 times fewer calculation steps than a typical digital computer implemented using similar technology.

Publication: IEICE TRANSACTIONS on Fundamentals Vol.E82-A No.2 pp.370-377

Publication Date: 1999/02/25

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Type of Manuscript: Special Section PAPER (Special Section on Analog Circuit Techniques and Related Topics)

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Tomochika HARADA, Shigeo SATO, Koji NAKAJIMA, "A Content-Addressable Memory Using "Switched Diffusion Analog Memory with Feedback Circuit"" in IEICE TRANSACTIONS on Fundamentals, vol. E82-A, no. 2, pp. 370-377, February 1999, doi: .
Abstract: For the purpose of realizing a new intelligent system and its simplified VLSI implementation, we propose a new nonvolatile analog memory called "switched diffusion analog memory with feedback circuit (FBSDAM). " FBSDAM has linear writing and erasing characteristics. Therefore, FBSDAM is useful for memorizing an analog value exactly. We also propose a new analog content-addressable memory (CAM) which has neural-like learning and discriminating functions which discriminate whether an incoming pattern is an unknown pattern or a stored pattern. We design and fabricate the CAM using FBSDAM by means of the 4µm double-poly single-metal CMOS process and nonvolatile analog memory technology which are developed by us. The chip size is 3.1 mm3.1 mm. We estimate that the CAM is composed of 50 times fewer transistors and requires 70 times fewer calculation steps than a typical digital computer implemented using similar technology.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/e82-a_2_370/_p

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@ARTICLE{e82-a_2_370,
author={Tomochika HARADA, Shigeo SATO, Koji NAKAJIMA, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={A Content-Addressable Memory Using "Switched Diffusion Analog Memory with Feedback Circuit"},
year={1999},
volume={E82-A},
number={2},
pages={370-377},
abstract={For the purpose of realizing a new intelligent system and its simplified VLSI implementation, we propose a new nonvolatile analog memory called "switched diffusion analog memory with feedback circuit (FBSDAM). " FBSDAM has linear writing and erasing characteristics. Therefore, FBSDAM is useful for memorizing an analog value exactly. We also propose a new analog content-addressable memory (CAM) which has neural-like learning and discriminating functions which discriminate whether an incoming pattern is an unknown pattern or a stored pattern. We design and fabricate the CAM using FBSDAM by means of the 4µm double-poly single-metal CMOS process and nonvolatile analog memory technology which are developed by us. The chip size is 3.1 mm3.1 mm. We estimate that the CAM is composed of 50 times fewer transistors and requires 70 times fewer calculation steps than a typical digital computer implemented using similar technology.},
keywords={},
doi={},
ISSN={},
month={February},}

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TY - JOUR
TI - A Content-Addressable Memory Using "Switched Diffusion Analog Memory with Feedback Circuit"
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 370
EP - 377
AU - Tomochika HARADA
AU - Shigeo SATO
AU - Koji NAKAJIMA
PY - 1999
DO -
JO - IEICE TRANSACTIONS on Fundamentals
SN -
VL - E82-A
IS - 2
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - February 1999
AB - For the purpose of realizing a new intelligent system and its simplified VLSI implementation, we propose a new nonvolatile analog memory called "switched diffusion analog memory with feedback circuit (FBSDAM). " FBSDAM has linear writing and erasing characteristics. Therefore, FBSDAM is useful for memorizing an analog value exactly. We also propose a new analog content-addressable memory (CAM) which has neural-like learning and discriminating functions which discriminate whether an incoming pattern is an unknown pattern or a stored pattern. We design and fabricate the CAM using FBSDAM by means of the 4µm double-poly single-metal CMOS process and nonvolatile analog memory technology which are developed by us. The chip size is 3.1 mm3.1 mm. We estimate that the CAM is composed of 50 times fewer transistors and requires 70 times fewer calculation steps than a typical digital computer implemented using similar technology.
ER -