The layout design of Integrated circuit is an essential design part of manufacturing. It is not only related to the function whether it is corrct or not, but also affect the performance, the cost and the power consumption of Integrated circuit. Because of the raising manufacturing technology, decreasing the size of feature, the affection of the various parasitic parameters is growing. A lot of problems should be considered on the layout design.
In this article, Cadence's Virtuoso custom designing platform makes use of full-custom to design the layout of ADC comparative circuit which uses the cmos technology, inputs the voltage of 2.5 V, samplings the frequency of 125 M, and takes dual-input Model which adopts the standard cmos of 90 nm of the Cadence companies, analyzes the performance of circuit and the simulation by the Spectre tools, and completes the layout by the providing craft by Cadence technology companies, analyzes detailedly the process of the layout design ,verifies DRC and LVS with Assura Tools to prove the layout design of this article fully meet the requirements.
Key Words：samply and hold circuit； layout design； cmos technology； full-custom.
