LNA Simulation Tutorial EE395 Lily Chan Spring 2012 March 22, 2012

Step 1 Open Analog Environment Setup models Setup > model libraries Add paths to models

Step 2 Go to Analyses tab Choose dc analysis Click the box to save DC Operating Point

Step 3 Add variables from schematic Variables > Copy from Cellview Input variable values

Step 4 Choose Analyses Select sp in the Analysis section Click select in the Ports section Click on the input and output ports on the schematic Select Frequency in the Sweep Variable section Enter the start/stop sweep range Select Do Noise = yes Enter your Input and output ports Click on OK Click on Netlist and Run (The traffic light button with the green light in the Analog Environment main screen)

Step 5 After the simulation is done running, click on Results > direct plot > main form Choose SP > plot type = Z-smith Then click on S11 and S22 buttons

Step 5 Result A window with the Smith chart should pop up showing you the S11 and S22 curves

Step 6 Go back to the Direct plot form from step 5 Select plot type Rectangular, Modifier = dB20 Click s11, s22 These are your input/output impedance matching curves

Step 7 On the direct plot form, click on S21 This is your gain

Step 8 On the direct plot form, choose Function = NF Modifier = db10 Click on Plot This is your noise figure