On-Chip Active Guard Band Filters to Suppress Substrate-Coupling Noise in Mixed-Signal Integrated Circuits

Keiko Makie-FUKUDA  Toshiro TSUKADA  

IEICE TRANSACTIONS on Electronics   Vol.E83-C   No.10   pp.1663-1668
Publication Date: 2000/10/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Electronic Circuits
substrate coupling noise,  switching noise,  noise suppression,  analog circuits,  mixed-signal integrated circuits,  

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An AC coupling configuration for the active guard band filters is introduced for suppressing substrate coupling noise in analog and digital mixed-signal integrated circuits. With this method, a substrate-coupling-noise cancellation signal can be supplied to a ground-level substrate by using a single 3-V supply on-chip circuits. Noise was suppressed to a maximum of less than 0.05 from 100 Hz to 2 MHz in a 0.35-µm CMOS test chip. Both experiments and a simulation based on the substrate extraction model showed the similar dependence of the noise-suppression effect on the arrangement of the guard-bands and analog circuits. The simulation is thus effective for optimizing the arrangement to suppress noise effects when designing a chip.