5.1mm2.The operating cycle time is 3.5 ns at the supply voltage of 3.3 V, which corresponds to the frequency of 286 MHz, Implementation of CG multiplication increases the transistor count only 4%. Also, CG multiplication has no effect on the delay in the critical path." />


A 286 MHz 64-b Floating Point Multiplier with Enhanced CG Operation

Hiroshi MAKINO  Hiroaki SUZUKI  Hiroyuki MORINAKA  Yasunobu NAKASE  Koichiro MASHIKO  Tadashi SUMI  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E79-C   No.7   pp.915-924
Publication Date: 1996/07/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on the 1995 Symposium on VLSI Circuits (Joint Issue with the IEEE Journal of Solid-State Circuits, Vol.31, No.4 April 1996))
Category: Logic
Keyword: 


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Summary: 
This paper presents a high speed 64-b floating point (FP) multiplier that has a useful function for computer graphics(CG). The critical path delay is minimized by using high speed logic gates and limiting the stage number of series transmission gates (TG's). The high speed redundant binary architecture is applied to the multiplication of significands. This FP multiplier has a special function of "CG multiplication" that directly multiplies a pixel data by an FP data. This multiplier was fabricated by 0.5 µm CMOS technology with triple-level metal of interconnection. The active area size is 4.25.1mm2.The operating cycle time is 3.5 ns at the supply voltage of 3.3 V, which corresponds to the frequency of 286 MHz, Implementation of CG multiplication increases the transistor count only 4%. Also, CG multiplication has no effect on the delay in the critical path.