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Highly parallel and energy-efficient exhaustive minimum distance search engine using hybrid digital/analog circuit techniques

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2 Author(s)
Chang Ki Kwon ; Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Seoul, South Korea ; Kwyro Lee

A minimum distance search engine (MDSE) is presented as a hardware accelerator for various exhaustive pattern-matching systems. This chip executes highly parallel computations of L/sub 1/-norms between an input query and stored multiple reference records, and searches for the minimum distance among them in a highly parallel fashion. Our architectural-level estimation shows that this MDSE can reduce energy dissipation by orders of magnitude as the number of records increases, compared with the conventional systems. We have designed a prototype 4-bit 8-word MDSE composed of merged memory logic (MML) and digital/analog-mixed winner-take-all circuit (DAM-WTAC) by using hybrid digital/analog circuit techniques. It was fabricated with a 0.6-/spl mu/m single-poly triple-metal CMOS technology. Experimental results show that our chip works properly at 3 V/10 MHz and has approximately four times larger throughput as well as four times higher energy efficiency, compared with the existing 8-bit microcontrollers.

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Very Large Scale Integration (VLSI) Systems, IEEE Transactions on  (Volume:9 ,  Issue: 5 )