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Stub vs. Capacitor for Power Supply Noise Reduction
IEICE TRANSACTIONS on Electronics
Publication Date: 2005/01/01
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Electronic Circuits
stub, decoupling capacitor, power supply noise, di/dt noise, IR drop,
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This paper compares a stub and a decoupling capacitor for power supply noise reduction. A quarter-length stub attached to the power supply line of an LSI chip works as a band-eliminate filter, and suppresses the power supply bounce of the designed frequency. The conditions where the stub is more effective than the same-area decoupling capacitor are clarified. The stub will work more efficiently and on-chip integration will be possible on high frequency operation LSIs.