Substrate noise simulation techniques for analog-digital mixed LSI design
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 Delta Sigma ADC 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.
substrate noise analog-digital mixed lsi crosstalk model macroscopic substrate noise delta sigma adc behavioral modeling analoghdl