Layout design is an important part of the rate decision according to the degree of automation design, and layout design methods can be divided into the design manual and automatic design of two categories. According to the place and route location and layout of the restrictions to limit the sub-module, the design methods can be divided into full-custom and semi-custom two categories. Since raising the level of manufacturing technology, feature size decreases, the various parameters on the circuit parasitic effects also growing in the territory of the design of a growing number of issues to consider.
This paper is a comparative analysis of the characteristics of digital converter using Cadence Virtuoso company, use the custom design platform for a method of customized reference voltage circuit ADC layout design,. ADC reference voltage circuit to maintain the use of the cmos technology, Range for 0.5 V, called the Cadence companies to provide standard cmos 90 nm process for using the tools Spectre circuit performance analysis and simulation, and Cadence technology companies to provide the documents to complete the layout, a detailed analysis of the layout design process, the DRC rules are introduced and use of Assura Tools DRC and LVS verification,and simulation test to prove that the layout of the paper fully meet the requirements. In the end, some mistakes of LVS DRC and analyzed.
Key Words：reference voltage circuit layout design cmos technology full-custom post layout simulation.
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