A Selective Shield Insertion Algorithm for Low Power Bus
Date Issued
2004
Date
2004
Author(s)
Chang, Hsin-Yi
DOI
en-US
Abstract
With the advance of process technology, the crosstalk between wires has become more serious than before, especially the noise induced by inductive effect. An efficient approach to reduce inductive noise is to insert shield (GND or Power line) between wires because the shield can be very good current return path. We propose an efficient shield insertion algorithm by characterizing realistic HSPICE simulation results. Based on the profiling information, it counts the allowable shield numbers. Besides, it divides the wires into several windows and analyzes the input behavior of each window to find out the most appropriate shield location of each window. Finally, the results of all windows will be gathered to obtain the final shield location of all wires. This algorithm takes the realistic HSPICE simulation results as input instead of mathematical model, so it can provide higher accuracy. This algorithm can save power dissipation and shorten delay time by reducing inductive noise. The experimental result shows that when the area overhead is less than 40%, every inserted shield can reduce about 5% power dissipation, and the delay can be shortened at the same time.
Subjects
低必v
電感效應
電流回流通路
匯流排
雜訊
HSPICE
bus
Low_Power
inductive_effect
noise
Type
thesis
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