7.5 MFLIPS Fuzzy Microprocessor Using SIMD and Logic-in-Memory Structure

Mamoru SASAKI  Fumio UENO  

IEICE TRANSACTIONS on Electronics   Vol.E77-C    No.7    pp.1075-1082
Publication Date: 1994/07/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Super Chip for Intelligent Integrated Systems)
fuzzy if-then rule,  fuzzy inference,  SIMD,  logic-in-memory,  multi-operand operation,  

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A fuzzy microprocessor is developed using 1.2 µm CMOS process. The inference scheme for the if-then fuzzy rules consists of three main steps i. e. if-part process, then-part process and defuzzification. In order to realize very high-speed inference and moderate programmability, we introduce three-type different structures i.e. SIMD, logic-in-memory and Wallace tree structures which are suitable for the three main steps. The inference speed including defuzzification is 7.5 MFLIPS which is 12.9 times higher than the previous VLSI implementation, and it can carry out many rules (960 rules) and many input and output variables (16 variables).