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IEICE TRANSACTIONS on Electronics

A 90 nm 4848 LUT-Based FPGA Enhancing Speed and Yield Utilizing Within-Die Delay Variations

Kazutoshi KOBAYASHI, Kazuya KATSUKI, Manabu KOTANI, Yuuri SUGIHARA, Yohei KUME, Hidetoshi ONODERA

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Summary :

We have fabricated a LUT-based FPGA device with functionalities measuring within-die variations in a 90 nm process. Variations are measured using ring oscillators implemented as a configuration of the FPGA. Random variations are dominant in a 4848 configurable array laid out in a 3 mm3 mm square region. It has a functionality to measure delays on actual signal paths between flip flops by providing two clock pulses. Measured variations are used to maximize the operating frequency of each device by choosing the optimal paths. Optimizations of routing paths using a simple model circuit reveals that performance of the circuit is enhanced by 2.88% in average and a maximum of 9.34%.

Publication
IEICE TRANSACTIONS on Electronics Vol.E90-C No.10 pp.1919-1926
Publication Date
2007/10/01
Publicized
Online ISSN
1745-1353
DOI
10.1093/ietele/e90-c.10.1919
Type of Manuscript
Special Section PAPER (Special Section on VLSI Technology toward Frontiers of New Market)
Category
Low-Power and High-Performance VLSI Circuit Technology

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