Lab Vlsi 1.docx

VLSI-Lab No. 01 Introduction and Installation of Micro wind and Model Sim

Objective: Learning the Basic of Micro wind and Model sim Software Required:  

Model Sim Micro wind

Theory: Micro wind: Microwind3 is a friendly PC Windows tool for designing and simulating microelectronic circuits at layout level. The tool features full editing facilities attractive views such as MOS characteristics, 2D cross-sections, 3D views, atomic views and efficient analog simulator. Micro wind may be configured in 1.2µm down-to Fin Fet technology. Microwind3 unifies: •

Schematic entry

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Pattern based simulator

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Spice extraction of schematic

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Verilog extractor

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Layout compilation

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On layout mix-signal circuit simulation

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Cross sectional & 3d viewer

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Net list extraction

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Bsim4 tutorial on MOS devices

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Sign-off correlation to deliver unmatched design performance

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Designer productivity

Installation: 

The first step is to down load the Micro wind software .

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Then double click on the setup file and run the setup.

Design Of n-MOS Following step are required for designing n-MOS.

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Select the polysilicon from the palette, then place it in a rectangular shape whose width must be greater than 5 lambda.

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Then select n-diffusion from the palette and place it on the polysilicon in form of a big rectangle.

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Next step is to select the clock from palette, place it on left side of polysilicon on ndiffusion and add desired parameters for input source. And Then again select the clock from palette, place it on Centre of polysilicon on n-diffusion and add desired parameters for input gate.

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Select the eye symbol from palette for a visible output.

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To check the output click on run button the in tool bar.

ModelSim ModelSim is a multi-language HDL simulation environment by Mentor Graphics, for simulation of hardware description languages such as VHDL, Verilog and System C, and includes a built-in C debugger. ModelSim can be used independently, or in conjunction with Intel Quartus Prime, Xilinx ISE or Xilinx Vivado. Simulation is performed using the graphical user interface (GUI), or automatically using scripts. Installation 

First, I download the Modelsim PE student Edition from mentor graphics.

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Then double click on software setup and install the software.

Modelsim Code for AND gate Procedure The steps to built AND gate Code are as follow. 

First of all open a new project from the file menu and name the project.

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Then select ‘create new file’ option and name it and select the type of file as Verilog.

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Click on the file name in the workplace section, this will open a text file to write the code.

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Write the code in the text file as given below.

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Now in the workspace open project tab, right click, select add to project from dropdown menu and select new file.

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This new file will contain the variable values for the main code, and is known as testbench with file type Verilog.

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Now select and click ‘compile all’ button from the tool bar, this will compile both the codes and check for errors.

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Now open the ‘library’ tab from the bottom of workspace and open work library, right click on the file test-bench and select simulate.