Browse to your design directory EELE414VLSIFall2011TannerProjectsHW03NMOSIVPart1 and enter the filename TOP.sp. - On the right, click in the Simulations Results File Name field.Department of Electrical and Computer Engineering Fall 2011(last revised 9711) Summary: Tanner EDA is a suite of tools for the design of integrated circuits.These tools allow you to enter schematics, perform SPICE simulations, do physical design (i.e., chip layout), and perform design rule checks (DRC) and layout versus schematic (LVS) checks.
There are 3 tools that are used for this process: S-edit T-SPICE L-edit - a schematic capture tool - the SPICE simulation engine integrated with S-edit - the physical design tool Using S-Edit (Schematic Entry Tool) T-SPICE (Analog Simulation Tool) Example: IV Curves of an NMOS TransistorS-edit is a schematic entry tool that is used to document circuits that can be driven forward into a layout of an integrated circuit. It also provides the ability to perform SPICE simulations of the circuits using a simulation engine called T-SPICE. Tanner Tools With L-Edit And T-Spice Download Libraries APart 1: Setup your Directory Structure download Libraries a) b) Log onto a computer on 6th floor Cobleigh. You want to create a directory for all of your Tanner EDA projects. Tanner Tools With L-Edit And T-Spice Zip A SetYou also will need to download and unzip a set of library model files from the course website that will be used for your simulations. Tanner Tools With L-Edit And T-Spice Zip File Called TannerLibrariesCreate a directory structure named EELE414VLSIFall2011TannerProjects c) Go to the course website and download the zip file called TannerLibraries.zip. Unzip it into your Tanner Projects directory. This group of files contain the necessary information to enter components into S-edit (circuit symbols), perform SPICE simulations (models), and do physical layout (layer definitions, DRC, LVS) Part 2: Start a New Design Setup Libraries a) Start S-Edit: - Start All Programs Tanner EDA Tanner Tools v12.6 S-Edit v12.6 b) Start a New Design: Using the pull down menus, create a new design: - File New - New Design A dialog will appear asking for a design name and location. When you give the name, Sedit will create a folder of that name in the directory that you provide that will contain all of the design files. You should give a descriptive name that represents each simulation you will be running. Enter the name HW03NMOSIVPart1 and browse to your EELE414VLSIFall2011TannerProjects directory - Click OK c) Create a new Cell A cell is a design element. A cell can contain multiple views such as schematics and 2 symbols. When performing a simulation, we will typically call the cell TOP. When we are testing a circuit, for example an inverter, the inverter will have its own cell that contains a schematic of the devices and a symbol. The inverter cell is instantiated in the TOP cell that contains ideal elements such as voltage sources and probes that are only used for simulation. Using the pull down menus, create a new cell view: - Cell New View: - enter the cell name TOP. ![]() However, all non-linear components such as MOS transistors require a model to describe their behavior. If you simply enter an NMOS symbol in your schematic, SPICE will not know what to do since each NMOS transistor fabricated in a different technology behave differently. In this example, we will use a transistor technology called Generic025, which represents a standard, 0.25um CMOS process. You will need to setup the SPICE models for this process in S-edit. Once you do that, when you enter an NMOS or PMOS transistor, you can then associate the 0.25um model to that symbol. Using the pull down menus, setup the SPICE models: - Setup SPICE Simulation - In the dialog that appears, you should highlight General on the left. On the right, click in the Library Files field. ![]() Browse select Generic025Kit Generic025SPICEModelsLevel1.lib - On the right, click in the SPICE File Name field. ![]() Browse to your design directory EELE414VLSIFall2011TannerProjectsHW03NMOSIVPart1 and enter the filename TOP.sp. On the right, click in the Simulations Results File Name field.
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