Crash Course: SI Wizard Analysis using SIwave and AEDT Circuit
Introduction
In this tutorial, we will guide you through the process of using SIwave and ANSYS Electronic Desktop (AEDT) for signal integrity analysis. Follow these steps to ensure a successful analysis.
Step-by-Step Guide
1. Upload Your PCB
Start by uploading your PCB. Click the button to view all the file types that SIwave can support.
2. Access the Signal Integrity Wizard
- Go to the simulation section and access the Signal Integrity Wizard.
- Select the lines you want to analyze and click Next.
3. Specify Driver and Receiver
For each line, specify:
- A driver on one end and a receiver on the other end.
- Whether you have an IBIS model (Yes or No).
- The signal definition, including bit rate, delay, rising time, and falling time.
4. Add Additional Information
Include any additional information for the lines, such as:
- Pull-up impedance: 50 ohm, 2.6 volts.
Click Next to proceed.
5. Select Grounds and Power Planes
Review the list of all grounds and power planes related to the RF lines you are analyzing. Ensure to select Use ANSYS Electronic Desktop to view results in AEDT.
6. Specify Transient Analysis
In the ANSYS Electronic Desktop, you can specify the transient analysis you want to perform. Remember, SIwave is an S-parameter solver, solving for the S-parameters of your bandwidth frequency.
7. Configure S-Parameter Solver
- In the Electronic Desktop, search for the S-parameter solver.
- Specify the frequency band and the number of points.
- Ensure the top frequency is related to the rising time, selecting a number shorter than the shortest rising time in your system.
- Click OK and launch the solver.
8. Analyze Results
Once the solution is available, go to the Electronic Desktop to view the constructed circuit by SIwave. You can examine the results for transient analysis on the receiver side and also view the Quick Eye diagram.
Conclusion
By following these steps, you can effectively use SIwave and ANSYS Electronic Desktop for comprehensive signal integrity analysis. For further assistance, consider reaching out to Ozen Engineering, Inc.
Crash Course: SI Wizard Analysis Using SIwave and AEDT Circuit Start by uploading your PCB. If you click this button, you can see all the file types that SI Wave can support. Go to Simulation and access the Signal Integrity Wizard. Select the lines that you want to analyze. Go next.
Here, for each line, you have to specify on one end a driver and on the other end a receiver. On the driver, you specify whether you have an IBIS model (yes or no) and you also specify the signal. The definition of the signal can be found here.
This is where we define the bit rate, delay, the rising time, the falling time. Then you go next. Here, you add any other information to the lines. For example, we have a pull-up impedance of 50 ohms and 2.6 volts. Go next.
Here is the list of all the grounds and the power planes related to the RF lines you are analyzing. Here, make sure to select "Use ANSYS Electronic Desktop" so you'll be able to see the results in the ANSYS Electronic Desktop. You will see the circuit and you can do a lot of things there.
You can specify the transient analysis that you want, not SI Wave to do but the electronic desktop to do. The last part is the most important part. Remember, SI Wave is an S-parameter solver. It's going to solve for the S-parameters of our bandwidth frequency.
Then, when you go to the electronic desktop, search for the S-parameter solver. It's going to solve for the S-parameters of our bandwidth frequency. There, you do all the signal integrity analysis.
Click here and you specify the frequency band, the number of points, and this number, which is the top frequency, is related to the rising time. Make sure to select the number here in the rising time that is shorter than the shortest rising time in your system. Click OK and launch the solver.
Now that we have a solution, we go to the electronic desktop and see the circuit. This circuit was constructed by SI Wave, and you can look at the results for the transient on the receiver side. You can also see the quick eye.
