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TMR-Based Logic-in-Memory Circuit for Low-Power VLSI
Akira MOCHIZUKI Hiromitsu KIMURA Mitsuru IBUKI Takahiro HANYU
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2005/06/01
Print ISSN: 0916-8508
Type of Manuscript: Special Section PAPER (Special Section on Papers Selected from 2004 International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC 2004))
MRAM, TMR device, dynamic current-mode logic, logic function, sum of absolute differences,
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A tunneling magnetoresistive(TMR)-based logic-in- memory circuit, where storage functions are distributed over a logic-circuit plane, is proposed for a low-power VLSI system. Since the TMR device is regarded as a variable resistor with a non-volatile storage capability, any logic functions with external inputs and stored inputs can be performed by using the TMR-based resistor/transistor network. The combination of dynamic current-mode circuitry and a TMR-based logic network makes it possible to perform any switching operations without steady current, which results in power saving. A design example of an SAD unit for MPEG encoding is discussed, and its advantages are demonstrated.