Start ADS and Create an Empty Project

Transcription

1 Start ADS and Create an Empty Project Look for a desktop icon or start menu item entitled Advanced Design System 2011 ADS will start up and you will see ultimately: ADS Session 1 click for new project Close the getting started with ADS dialog box, and create a new workspace by clicking on the indicated button bar folder icon Click next to bring up the Workspace Name dialog ECE 4670 ADS Session 1 1

2 Give the workspace a name and note where it is being placed so you can find it again later ADS creates a folder structure for each workspace Each project holds a variety of file types placed in the subfolders accordingly For example, you can have many schematic files, plot files, and layout files all within a single workspace If a workspace was already open, ADS will ask you save it and then close it A sample workspace, ece467_lab1_wrk, has already ADS Session 1 2 ECE 4670

3 Working with ece467_lab1_wrk been created and is available on the ECE4670 Web Site: From uccs.edu/wickert/ece4670/ Un-zip this into your user \hpeesof project folder Working with ece467_lab1_wrk Then from the ADS main/project window double-click this project to open it ECE 4670 ADS Session 1 3

4 Once open the workspace will contain four schematics and four output files Click to get an empty schematic window Double-click to open an existing document, schematic or output plot When you click new schematic you can title in the cell field then click OK Give the schematic a title and move on via OK At this point open the particular schematic under the cell OP_Amp_LPF ADS Session 1 4 ECE 4670

5 Working with ece467_lab1_wrk This schematic is set up to perform an AC analysis of an active lowpass filter ADS has a number of controller blocks that are used to perform a given simulation type Here we have used an AC controller AC Controller Other components have been brought onto the schematic too, including an AC source, resistors, grounds, an OpAmp, and a capacitor To place a component click on it in the palette and then move the cursor over the schematic and click again where you want to place it The cursor stays loaded with the same component until you hit the esc key ECE 4670 ADS Session 1 5

6 All devices related to a simulation are brought from the palette docked at the left side of the schematic window In the figure above a portion of the Lumped-Components palette is visible Other palettes can be selected from the pull-down just above devices palette The OpAmp for example can be found under the System- Amps & Mixers palette You can add wires to the schematic by clicking on the wire button or using crl-w (always use esc to escape from a particular place or edit mode) ADS Session 1 6 ECE 4670

7 Working with ece467_lab1_wrk The last step in the schematic is to configure the AC controller Here we have set up a log sweep from 10 Hz to 1 MHz with 50 points per decade New we can run the simulation by clicking the shaped button If all goes well, that is no error messages, a plot window will open ECE 4670 ADS Session 1 7

8 Place a rectangular plot element here You now place a rectangular plot element on the plot window and configure it as shown below We want to plot V_out over V_in in db, so we choose to write a custom plotting expression Manually enter the plot expression Click here to add this expression to the trace list Bring up the help system for more information on plotting functions ADS Session 1 8 ECE 4670

9 Working with ece467_lab1_wrk The available functions can be found by clicking Help You can later configure the plot by double-clicking on the plot element to make the x-axis log and change scales, colors, etc, etc... ECE 4670 ADS Session 1 9

10 Double-click on the plot and then choose the Plot Options tab to change the axis type and add custom plot labels Double-click on the plot trace to bring up the trace options dialog The final result is shown below as a screen capture, and then as a plot cut and pasted into this document ADS Session 1 10 ECE 4670

11 Working with ece467_lab1_wrk Used to fit plots on plot page into the current window size (just like the schematic) Cut and paste into document (below) Multiple plots can be added to the same plot window You should save your plot window as it will be saved into the project along with the schematic (*.dds file in workspace) Gain (db) db(v_out/v_in) -60 1E1 1E2 1E3 1E4 1E5 1E6 Frequency (Hz) If you run the simulation again, with different settings, the ECE 4670 ADS Session 1 11

12 plot window update Each page of a plot window can contain multiple plots of various types, and each plot window can contain multiple tabbed pages, (nice!) You can put markers on your plots similar to the way markers work on spectrum and network analyzers in the lab Summary We have just scratched the surface of ADS at this point There are 13 total controller blocks available for running simulations There are communications and DSP specific blocks ADS is very strong in modeling radio frequency/microwave circuits There is a 2.5D electromagnetic field (EM) simulator A 3D field simulator (EM Pro) for antennas & structures There is a layout editor for PCBs and more... Stay tuned for more ADS Session 1 12 ECE 4670