cadencespectre使用手册_spectre仿真资源-CSDN文库

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《CADENCE SPECTRE 使用手册：深入解析与应用》标题和描述中提及的“CADENCE SPECTRE 使用手册”是针对电子设计自动化（EDA）领域内一款专业且功能全面的软件工具——Cadence EDA系统中的Spectre模块进行详细介绍的指南。Spectre作为Cadence EDA系统的核心组成部分之一，主要负责电路模拟与分析，尤其在模拟电路、混合信号电路的设计与验证方面表现出色。 ### Cadence EDA系统概览 Cadence EDA系统是一个集成了电路图输入、设计仿真、数据分析、物理布局及最终验证等模块的微芯片电子设计自动化平台。这套工具旨在为专业用户提供全尺寸、混合信号微芯片的开发环境。在美国大多数专业混合信号微电子公司中，使用的Cadence工具与高校提供的版本相同，这确保了学术研究与产业实践的无缝衔接。 ### Spectre在Cadence EDA系统中的角色 Spectre是Cadence EDA系统中的一个关键模块，专注于电路的模拟与分析。它能够对复杂的模拟电路和混合信号电路进行精确的仿真，提供高性能的电路性能评估和验证。Spectre的强项在于其对模拟设计/仿真/布局的支持，以及对混合信号电路的验证能力，通常与用于数字设计/仿真/布局的其他工具配合使用，以便在Cadence工具中完成顶层的整体验证。 ### Cadence EDA系统的设置与使用要使用Cadence EDA系统，需具备三组文件： 1. **Cadence工具**：由Cadence公司提供的设计工具，位于/home/cadence目录下，具有VLSI集成、项目管理、电路仿真、设计规则验证等能力。 2. **基于晶圆厂的设计套件**：Cadence工具必须得到基于特定晶圆厂的设计套件支持。本课程使用的是由北卡罗来纳州立大学开发的Cadence设计套件（NCSU CDK），该套件通过多个技术文件和自定义SKILL代码进行了定制，包含层定义、寄生电容、布局单元、SPICE仿真参数、DRC、提取和LVS验证规则等信息，特别适用于通过MOSIS IC制造服务进行的模拟/全定制数字CMOS IC设计。 ### Cadence EDA系统的工作流程 1. **设计规则**：设计规则基于特定工艺节点（如AMI的C5N过程，0.5微米3金属2多晶硅过程）设定，这是Cadence系统在本课程中的基础。 2. **设计环境**：NCSU CDK提供了定制化的设计环境，使得用户能够在其中执行一系列设计与验证任务。 3. **工具使用**：用户通过调用Cadence工具和NCSU CDK提供的功能，完成从电路图设计到物理布局、再到验证的整个设计流程。 4. **仿真与分析**：Spectre作为Cadence EDA系统的关键部分，负责电路的模拟与分析，确保设计的准确性和可靠性。 ### 结论 Cadence EDA系统，特别是其中的Spectre模块，在微电子设计领域扮演着至关重要的角色。通过深入理解其工作原理和使用方法，设计人员可以高效地完成复杂电路的设计与验证，推动电子产品的创新与发展。

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CS/EE 5720/6720 – Analog IC Design

Tutorial for Schematic Design and Analysis using Spectre

Introduction to Cadence EDA:

The Cadence toolset is a complete microchip EDA (Electronic Design Automation)

system, which is intended to develop professional, full-scale, mixed-signal microchips.

The modules included in the toolset are for schematic entry, design simulation, data

analysis, physical layout, and final verification. The Cadence tools at our university are

the same as those at most every professional mixed-signal microelectronics company in

the United States. The strength of the Cadence tools is in its analog

design/simulation/layout and mixed-signal verification and is often used in tandem with

other tools for digital design/simulation/layout, where complete top-level verification is

done in the Cadence tools.

An important concept is that the Cadence tools only provide a framework for doing

design. Without a foundry-provided design kit, no design can be done. The design rules

used by Cadence set up in this class is based for AMI’s C5N process (0.5 micron 3 metal

2 poly process).

So, how is Cadence set up?

Broadly, there are three sets of files that need to be in place in order to use Cadence.

1) The Cadence tools

These are the design tools provided by the Cadence company. These tools are

located in the /home/cadence directory. They are capable of VLSI integration,

project management, circuit simulation, design rule verification, and many other

things (most of which we won't use).

2) The foundry-based design kit

As mentioned before, the Cadence tools have to be supported by a foundry-based

design kit. In this class, we use Cadence design kit developed by the North

Carolina State University (NCSU CDK). NCSU CDK provides an environment

that has been customized with several technology files and a fair amount of

custom SKILL code. These files contain information useful for analog/full-

custom digital CMOS IC design via the MOSIS IC fabrication service

(http://www.mosis.org). This information includes layer definitions (e.g. colors,

patterns, etc.), parasitic capacitances, layout cells, SPICE simulation parameters,

Diva rules for Design Rule Check (DRC), extraction, and Layout Versus

Schematic (LVS) verification, with various GUI enhancements.

For more information on the capability of the NCSU CDK, go to

http://www.cadence.ncsu.edu/CDKoverview.html

This design kit is located in the /home/cadence/ncsu/local directory. All the

design parameters that are needed by the Cadence tools are located in various files

in the sub-directories you will find here. The nominal spice parameters for n type

transistors for AMI’s 0.5 micron process used in this class can be found in

/home/cadence/ncsu/local/models/spectre/nom/ami06N.m.

3) The set up files in your local cadence directory

There are set up files that should be in your local Cadence directory (i.e. the

directory from which you invoke Cadence) that sets up the required local

environmental variables for Cadence to work on your computer terminal. They

are as follows:

.cdsinit, .cdsplotinit, .simrc (sets up the variables to be used by NCSU CDK)

.cdsenv (not essential, but sets your preferences which can be different from user

to user)

Also we need a .cshrc file to source the current version of cadence we are using in

this class.

Now, of the three sets of files, the first two sets containing the cadence tools and the

NCSU CDK have been already set up by the Cadence Administrators for the class. In this

tutorial, the process of setting up the required files in your local cadence directory is

explained.

Setting up Cadence2000

Note: People who have already set up Cadence before still need to follow the steps

below.

Before you start using cadence you need to complete the following steps:

1. First, before anything else, make a directory from which to run Cadence. This is

important so that all of Cadence’s files end up in a consistent location. I

recommend making an IC_CAD directory and then under that making a cadence

directory:

mkdir IC_CAD

mkdir IC_CAD/cadence

2. You need to add the following lines in your .tcshrc file (or whatever shell setup

file you use…) Just open it up with emacs and add:

set path = (/uusoc/facility/cad_common/local/bin $path)

setenv ICDIR IC_CAD

setenv CADENCEDIR $ICDIR/cadence

剩余20页未读，继续阅读

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yww_yww

2020-12-10

emm这不是全面的使用手册吧，我还以为是user guide，原来就是个小例子。。
shensss

2013-05-08

cadence有点复杂，没能学成功，最终放弃使用了
kanal0417

2014-08-15

不是我想要的资料

kenny6886

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