Substrate Noise Simulation Techniques for Analog-Digital Mixed LSI Design

Makoto NAGATA  Atsushi IWATA  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E82-A   No.2   pp.271-278
Publication Date: 1999/02/25
Online ISSN: 
Print ISSN: 0916-8508
Type of Manuscript: INVITED PAPER (Special Section on Analog Circuit Techniques and Related Topics)
analog-digital mixed LSI,  substrate noise,  crosstalk,  AnalogHDL,  behavioral modeling,  macroscopic substrate noise model,  ΔΣADC,  

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Crosstalk from digital to analog circuits can be causative of operation fails in analog-digital mixed LSIs. This paper describes modeling techniques and simulation strategies of the substrate coupling noise. A macroscopic substrate noise model that expresses the noise as a function of logic state transition frequencies among digital blocks is proposed. A simulation system based on the model is implemented in the mixed signal simulation environment, where performance degradation of the 2nd order ΔΣADC coupled to digital noise sources is clearly simulated. These results indicate that the proposed behavioral modeling approach allows practicable full chip substrate noise simulation measures.