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Small-Amplitude Bus Drive and Signal Transmission Technology for High-Speed Memory-CPU Bus Systems

Tatsuo KOIZUMI, Seiichi SAITO

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Summary :

Computing devices have reached data frequencies of 100 MHz, and have created a need for small-amplitude impedance-matched buses. We simulated signal transmission characteristics of two basic driver circuits, push-pull and open-drain,for a synchronous DRAM I/O bus. The push-pull driver caused less signal distortion with parasitic inductance and capacitance of packages, and thus has higher frequency limits than the open-drain GTL type. We describe a bus system using push-pull drivers which operates at over 125 MHz. The bus line is 70 cm with 8 I/O loads distributed along the line, each having 25 nH7pF parasitic inductance and capacitance.

Publication
IEICE TRANSACTIONS on Electronics Vol.E76-C No.11 pp.1582-1588
Publication Date
1993/11/25
Publicized
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DOI
Type of Manuscript
Special Section INVITED PAPER (Special Issue on LSI Memories)
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