This dissertation address the issues of design automation of analog and mixed signal CMOS circuits. An interactive platform has been created for the design of CMOS circuits. The user interactive design platform generates device sizes and operating points from a given set of specifications and provides an easy to use interface in-order to tune the performance of the circuit for a given application. A novel combination of a knowledge-based circuit parameter estimation and a simulation driven design flow is used for the design of these circuits. The tool also provides a variety of outputs including a Spice netlist, plots for transient, DC and AC analysis and a tabulated overall system description.
In-order to validate the performance of the design flow, three amplifier topologies namely a two-stage miller compensated circuit, a transconductance and a folded cascode amplifier have been designed. Each of these amplifier topologies have been implemented using different process parameters and supply voltages. Mixed signal circuits such as analog to digital converters, specifically the pipeline and SAR (successive approximation register) architectures have been implemented using this design flow. Finally a selection criterion for amplifier as well as analog to digital data converters(ADC) has been designed.
