This document is supposed to be a general overview of the. Unlike a schematic window, the layout window has and uses coordinates for. All the cadence design tools are managed by a software package called the design framework ii. The cmos14tb process is a triplemetal, single poly cmos process. To design with symbols in layout, you should make sure that all of the vdd and gnds are connected.
The inverter layout is used as an example in the tutorial. Check out our guide on setting up a design environment and starting virtuoso start. Cadence virtuoso tutorial university of southern california. This will automatically set the view name to layout. A dialog box appears asking if we were to open it in existing cell view, or new cell view. Sep 02, 2014 at the command prompt, make sure that ic6. Go googling for cadence tutorials there are quite a few on the net. Click ok and the next window will ask you to choose the layout view this will bring up sidebyside copies of your schematic and layout views. The tutorial will introduce you to some of the features. You can read pdfs directly in the command window by typing evince filename. Once circuit specifications are fulfilled in simulation, the circuit layout is created using the virtuoso layout editor.
Each tutorial chapter is divided into several sections. Ee559 lab tutorial 3 virtuoso layout editing introduction purdue. Once again if you encounter a popup about a license not being available, click \yes to try the next license until the popup closes. Starting a new layout design on page 22 creating instances for n and ptransistors on page 26 connecting the inputs and outputs on page 211 checking design rules on page 232. Starting a new layout design on page 22 creating instances for n and ptransistors on page 26 connecting the inputs and outputs on page 211 checking design rules on page 232 saving your design on page 235.
Cadence virtuoso layout suite for electrically aware design. It is assumed you have followed tutorials a and b and have the schematic and layout views of a cmos inverter. Amplifier simulation tutorial northeastern university. This is the first video out of 2 on creating the layout. Automatic placement for custom layout in virtuoso layout. In this short tutorial students are exposed to the steps involved in remotely connecting to the ews servers and launch the virtuoso simulator. The virtuoso window will give the message as shown below. The tutorial for virtuoso can be found in cdsdoc at. Check and save your design now you need to check and save your design either click the top left button or go to design check and save. This parasitic probe only works if you extracted the layout with the parasitics switch on.
After request, you will receive an email with your account and password. Thesecoursesusethencsufreepdk45libraryfora45nmtechnology. Now you have e xtracted schematic and layout views of your layout with all the parasitics. Cadence design systems provides tools for different design styles. I meant to say design rule check drc not dynamic rule. Tutorial a and b cover the use of the virtuoso schematic entry tool, affirma analog simulation tool and virtuoso layout tool. Creating layout with virtuoso layout xl vxl we will be using pcells developed by ncsu to layout a 2 inputs nand gate, denoted as nand2. State variable size x 524 open save all reload page 257. Enter inv as the cell name and choose virtuoso as the design tool. After completion of this tutorial, you should be able to. This should start an html browser that displays the table of contents for the tutorial.
The purpose of this lab tutorial is to guide you through the design process in creating a custom. You will create a schematic and a symbol for a static cmos inverter. The other window is the layout window virtuoso layout editing where you perform the place and route of the inverter layout. Try either cadence tutorial or cadence hotkeys and youll find some good ones with nice pictures. This tutorial describes how to generate a mask layout in the cadence. Ece595b lab tutorial 3 virtuoso layout editing introduction. Insert instances into your design connect instances together using wires change instance properties name nets add pins to. Link between vlx virtuoso xl schematic and virtuoso layout. How to export a gdsii file from virtuoso, using streamout tool this cmp tutorial is only accessible through a nda in place. Cell design tutorial and virtuoso layout editor user guide summary of cadence tool setup. In this tutorial you will learn to use three cadence products.
In order to be able to run post layout simulations, the following needs to be fulfilled. Composer symbol, composer schematic and the virtuoso layout editor. After you hit ok, the virtuoso screen will appear as shown below. Cadence tutorial colin weltinwu step 1 before anything you need to modify your. Cell design tutorial 2 creating the inverter layout this chapter introduces you to the virtuoso layout editor as you perform the following tasks. Ece4430analog ic design 8 including transistor model file in virtuoso analog design environment, select setup model libraries, and add the model for ami05. This tutorial demonstrates how to complete the physical design layout, design rule. A tutorial on using the cadence virtuoso editor to create. Creating full custom layouts using cadence virtuoso layout editor. For enforcing it, a design rule check drc is performed. First, adjust the grid snap spacing so that it matches the minor grid spacing.
Pdf cadence tutorial cadence tutorial schematic entry. The virtuoso schematic composer is used to create the schematic of your design. When all else fails go googling for cadence tutorials there are quite a few on the net. You are assumed to know how to use layout editor, virtuoso. Virtuoso layout editor this tutorial will cover the basic steps involved in using the cadence layout editor called virtuoso, extracting layout, and running simulation on the created layout. Link between vlx virtuoso xl schematic and virtuoso. Cadence virtuoso layout suite for electrically aware design cadence design systems enables global electronic design innovation and plays an essential role in the creation of todays electronics. The motivation for this manual is to provide a stepbystep tutorial to design and simulate circuits using cadence ic 6. Custom ic layout layout cell design tutorial chapter 2.
Ee559 lab tutorial 3 virtuoso layout editing introduction. A window appears and select tutorial for the library name field, and type in inverter for the cell name. First we need to create a layout view of our nand2. Chapter virtuoso layout editor school of computing. These courses use the ncsu freepdk45 library for a 45nm technology. In the rules tab, specify the directory for the pex rules file calibre. Redraw the layout to see if the new color was applied well. Choose tools display resource manager in the main virtuoso window. Layout with virtuoso multifunctional integrated circuits. This will setup your directory by copying in various files that are needed to run the cadence tools, including. The new file dialog box appears containing the name of the.
Jan 22, 2019 we will use virtuoso to edit the layout and calibre to run design rule checks. Link between vlx virtuoso xl schematic and virtuoso layout database ahamlett over 10 years ago when creating layout from vxl, the instances are placed with names that correspond to the instances in the schematic. Affirma spectre circuit simulation user guide and affirma rf simulator user guide 8 further reading on layout. How to export a gdsii file from virtuoso, using streamout tool. Virtuoso will always use the layer selected in the lsw for editing. In t his course, we will strictly use the tools associated with analog circuit design. The view name should be schematic and the tool field should be schematic xl.
In the schematic, it will contain devices transistors connected together with nets wire. December 1999 21 cell design tutorial 2 creating the inverter layout this chapter introduces you to the virtuoso layout editor as you perform the following tasks. The layout window is sometimes called the layout xl window, as this is where editing is most often done with this tool, but it is basically just the virtuoso layout editor with some new options. Virtuoso layout editor tutorial cmpe 315cmpe640 umbc saad rahman chintan patel 1. The purpose of this tutorial is to show how to generate the 3 following files before submitting a design to cmp. The new file dialog box appears containing the name of the cell view, layout etc. Inverter tutorial with virtuoso multifunctional integrated. After developing a schematic of your design, the next step in the design flow is creating a layout of your design using cadence virtuoso. Under manuals, there are the virtuoso schematic editor tutorial and the virtuoso schematic editor user guide that you may find helpful. When display resource tool box appears, click edit, and display resource editor window appears.
Make sure you look at the virtuoso ciw window and there are no errors or warnings, if there are any you have to go back and fix them. Inputoutput type is for supply changes, and it is necessary only for layout. This tutorial isanintroductionto schematic captureandcircuitsimulationforengn1600usingcadence virtuoso. Cadence virtuoso schematic design and circuit simulation tutorial introduction this tutorial is an introduction to schematic capture and circuit simulation for engn1600 using cadence virtuoso.
Cmos14tb process is a triplemetal, single poly cmos process. This tutorial will cover the basic steps involved in using the cadence layout editor called virtuoso, extracting layout, and running simulation on the layout. A tutorial on using the cadence virtuoso editor to create a. The layers in a layout describe the physical characteristics of the device and have more details than a. The vast majority of users create layout with the platform at the purely manual shapebased editing level virtuoso layout suite l, or the assisted connectivitybased editing level virtuoso layout suite xl. Cmpe 315cmpe640 virtuoso layout editor umbc tutorial ekarat laohavaleeson chintan patel minor spacing. In schematic composer window, click on tools design synthesis layout xl 4. Virtuoso schematic composer tutorial june 2003 7 product version 5. Cadence virtuoso layout suite xl datasheet pdf download. This tutorial will cover the basic steps involved in using the cadence layout editor called virtu oso. Customers use cadence software, hardware, ip, and expertise to design and verify todays mobile, cloud and connectivity applications. In the inputs netlist tab, select export from schematic viewer. This tutorial is based on the north carolina state university cadence design kit ncsu cdk. This tutorial covers the timing analysis on the schematic and extracted view.
The resulting layout must verify some geometric rules dependent on the technology design rules. Physical layout designers and printed circuit board designers can use the information as background material to support their work. This tutorial will help you to get started with cadence and successfully create symbol, schematic and layout views of an inverter. The cmosis5 design kit is based on the hewlettpackard cmos14tb process. The basic steps of using the cadence layout editor called virtuoso will be. A layout describes the masks from which your design will be fabricated. Page 1 virtuoso layout suite xl cadence virtuoso layout suite xl is the connectivity and constraintdriven layout environment of the virtuoso custom design platform, a complete solution for frontto back custom analog, digital, rf, and mixedsignal design. Cmpe 315cmpe640 virtuoso layout editor umbc tutorial ekarat laohavaleeson chintan patel virtuoso layout editor this tutorial will cover the basic steps involved in using the cadence layout editor called virtuoso, extracting layout, and running simulation on the created layout. If you dont know the layout editor, follow the online tutorial in the cdsdoc. Layout edition and verification with cadence virtuoso and diva. Cell design tutorial june 2000 7 product version 4. When creating layout from vxl, the instances are placed with names that correspond to the instances in the schematic. Cmos inverter layout tutorial concordia university.
If your design had not passed lvs you will get a warning message that states that the schematic and the layout are not compatible. The beginning of each section lists the expectations of what you will learn. We will now design the layout for the pmos and nmos transistors and connect them together to form a cmos inverter. Cell design tutorial 1 getting started with the cadence software in this chapter, you learn about the cadence software environment and the virtuoso layout editor as you do the following tasks. This video will guide you to how to do circuit design in cadence virtuoso schematic and making its layout. Get one by logging in to instructional server in 199 cory, 273 soda or over the net using ssh to cory. In this tutorial session, i draw the layout design of inverter and their physical verification using calibre. So, you will see that some tutorials use painterly rectangles, while others use. Copying the tutorial database on page starting the cadence software on page 15 opening designs on page 110 displaying the mux2 layout on page 115.
This software manages the development process for analog, digital, and mixedmode circuits. Using emx virtuoso april 2007 integrand software, inc. Go to the library manager and execute lmfilenewcell view. Alternatively, you can select the layout l tool, instead of typing out the view name. Consult the virtuoso manual and online documentation for further information. Choose any metal layer, change fill color and outline color, and click apply.
Schematic to layout design flow in cadence virtuoso youtube. If you are not running cds tools, do so according to lab 1. Link between vlx virtuoso xl schematic and virtuoso layout database. On the very top of the window the title bar should say virtuoso layout editing.
Cadence virtuoso schematic design and circuit simulation tutorial. You can proceed with the subsequent steps even though lvs failed. The layers in a layout describe the physical characteristics of the device and have more details than a schematic. Cadence virtuoso schematic composer introduction contents.
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