Method of reducing switching noise in a power distribution...

Details Method of reducing switching noise in a power distribution... Method of reducing switching noise in a power distribution...

2006-09-05

2006-09-05

Le, Dinh T. (Department: 2816)

Wave transmission lines and networks

Coupling networks

Frequency domain filters utilizing only lumped parameters

C333S203000

Reexamination Certificate

active

07102466

ABSTRACT:
Voltage fluctuations, especially due to a resonant effect of a power distribution system, result in serious timing skews in a high-speed digital system. Adding extra resistive loadings for coupling out the noise into external terminations will reduce a quality factor of the power distribution system, which will effectively minimize the noise accumulation. The external coupled resistive terminators are preferably formed on positions of a microstrip resonator where relatively high noise fluctuations occur. Each of the external coupled resistive terminators may be formed of a resistor, a transmission line with a resistor at one end, a lossy transmission line with an open circuit at one end, or a quarter-wavelength lossy transmission line. Simulation results indicate that the maximum voltage fluctuations are suppressed from 750 mV to 150 mV at a resonant frequency and about 50% for an overall range of the operating frequencies.

REFERENCES:
patent: 4333062 (1982-06-01), Uwano
patent: 402193401 (1990-07-01), None
patent: 02001156506 (2001-06-01), None

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