A deep-submicron sigma-delta ADC design flow

Through the design verification of a 0.18 μm CMOS low power Sigma-Delta ADC modulator,a new deep-submicron mixed-signal system design method is presented in this paper.Compared to traditional design flow,the SIMULINK model is adopted in the systematical behavioural verification,and the SPICE macro model to transistor circuit design as the circuit level verification method is created.The macro model gets 97.5% precision but only cost 6.5% simulation time of the fine circuit level.The transistor circuits can be designed according to the macromodel specification and verified only in one time,resulting in improvement of the system design efficiency.