1998 Fiscal Year Final Research Report Summary
Study on an associative memory system with a new analog memory device
| Project/Area Number |
09555106
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
電子デバイス・機器工学
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| Research Institution | Tohoku University |
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Principal Investigator |
NAKAJIMA Koji Tohoku University Research Institute of Electrical Communication, Professor, 電気通信研究所, 教授 (60125622)
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| Co-Investigator(Kenkyū-buntansha) |
MIZUGAKI Yoshinao Tohoku University Research Institute of Electrical Communication, Research Assoc, 電気通信研究所, 助手 (30280887)
SATO Shigeo Tohoku University Research Institute of Electrical Communication, Research Assoc, 電気通信研究所, 助手 (10282013)
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| Project Period (FY) |
1997 – 1998
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| Keywords | nonvolatile analog memory / content-addressable memory / recognition / SDAM / analog technology |
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| Research 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 4\(\mu\)m double-poly single-metal CMOS process and nonvolatile analog memory technology which are developed by us. The chip size is 3.1mm x 3.1mm.
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.
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