Pulsed wave interconnect

Pulsed wave interconnect is proposed for global interconnect applications. Signals are represented by localized wave-packets that propagate along the interconnect lines at the local speed of light to trigger the receivers. Energy consumption is reduced through charging up only part of the interconne...

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Bibliographic Details
Published in:IEEE transactions on very large scale integration (VLSI) systems 2004-05, Vol.12 (5), p.453-463
Main Authors: Pingshan Wang, Pei, G., Kan, E.C.-C.
Format: Article
Language:English
Subjects:
Applied sciences
Attenuation
Capacitance
CMOS
CMOS technology
Design. Technologies. Operation analysis. Testing
Dispersions
Distortion measurement
Electric potential
Electronics
Energy consumption
Exact sciences and technology
Foundries
Insertion
Integrated circuits
Isolation technology
Optical propagation
Receivers
Repeaters
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
SPICE
Studies
Very large scale integration
Voltage
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Summary:Pulsed wave interconnect is proposed for global interconnect applications. Signals are represented by localized wave-packets that propagate along the interconnect lines at the local speed of light to trigger the receivers. Energy consumption is reduced through charging up only part of the interconnect lines and using the voltage doubling property of the receiver gate capacitances. In a 0.18-/spl mu/m CMOS technology case study, SPICE simulations show that pulsed wave interconnect can save up to 50% of energy and /spl sim/30% of chip area in comparison with the repeater insertion method. A proposed signal splitting structure provides reasonable isolations between different receivers. Measured S-parameters of 3.8-mm interconnect lines fabricated through CMOS foundry showed that the distortion and attenuation of a pico second signal are much less serious than the theoretical predictions. Pulsed wave interconnect also enables time division application of a single line to boost its bit rate capacity. The use of nonlinear transmission lines (NLTL) is also proposed to overcome pulse broadening and attenuation caused by dispersion and frequency-dependent losses. Pulsed waves on an NLTL may be generated, transmitted, split and detected with components realizable in bulk and SOI CMOS technologies. Tapered NLTL can be used for pulse compression. NLTL edge sharpening abilities may be applicable for signal rise time control.
ISSN:1063-8210
1557-9999
DOI:10.1109/TVLSI.2004.826196