High-level Model Research Of High-speed DAC Based On Verilog-AMS

The high-level model research of high-speed D/A converters based on Verilog-AMS is studied in this paper. Segmented current-steering DAC is selected as the typical of high-speed DAC. The current-steering DAC is divided into modules which are sorted by structure and function. Behavioral models of these modules are set up with Verilog-AMS, and simulations of the models are done in Candence Spectre.Then analysis of model error is taken. When non-ideal factors are considered as parts of behavioral models, the models are rebuilt, and simulations of them are done once again in Candence Spectre. All the simulation waves are shown in the paper. They are analysed based on corresponding circuit. The simulation result shows that the behavioral model of Verilog-AMS will shorten the time of simulation and improve the precision of simulation. The result validates that replacing the concrete analog circuits with the behavioral model of Verilog-AMS is efficient and feasible.