AMSD在模块级和系统级设计的应用

The Application of AMSD in the Module Design and System Design

数模混合芯片是现在芯片设计的主流方向之一,设计过程中的数模混仿验证,对芯片设计成功与否至关重要。为此,EDA提供商都致力于提供可靠、快速、灵活的混仿工具。Cadence公司的"AMSD"数模混仿工具是这类工具中的佼佼者。AMSD具有可靠的仿真精度,并且可以根据需要,选择spectre\aps\Ultrasim三种模拟仿真引擎。对于系统仿真,AMSD灵活地集成开发了一套支持不同网表格式于一体的仿真模式,强大的debug模式可实时准确的监控信号变化,最大化混仿的效率。本文主要介绍Cadence公司的"AMSD"数模混仿工具,及其在设计中的使用流程,最后介绍了两个AMSD的应用实例,一个是LTE芯片内的sigma delta DAC和带DEM功能的TxDAC的混合仿真,此应用需要高精度保证;另一个是集数字rtl代码IP,自建模拟IP和加密网表IP,三种不同格式于一体的网表,进行安全芯片的系统"混合"仿真,此流程是其它混仿工具目前不能实现的。

Mixed chip design is one of the main important to ensure the chip design success. directs at present. The verification of the mixed chip many EDA companies have tried their best to provided and smart mixed signal simulation tools. And the AMSD of Cadence is one of the best tools in these tools. design is very reliable, fast AMSD has reliable simulation precision and can smart choose the three simulate engines, spectre, aps and ultrasim, according to the design need. For system design, AMSD smart integrates a suit of simulation mode that can support kinds of netlist format. In the meantime, its strong debug mode can monitor the change of the signal exactly with real time, which greatly increases the design efficient. This paper first introduces AMSD which is the Cadence＇ s the mixed signal simulation tool. Second, the paper introduces the design flow of AMSD. Finally, the paper introduces two applications of AMSD to the verification of module design and system design, respectively. The first application is the mixed simulation of sigma delta DAC and TxDAC with DEM; both of these two modules are used in a LTE chip. The second application is the verification of a security chip can not be verified by other tools at present that integrates digital code, analog IP and encrypted netlist IP.