Crosstalk and Impedance Scan

Crosstalk and Z0 Impedance are important in Signal Integrity. Crosstalk is any unwanted signals in a communication channel (as in a telephone, radio, or computer) caused by transference of energy from another circuit (as by leakage or coupling).

In this video, we studied Crosstalk scan on a PCB by using SIWave. Study is done on both Time domain and Frequency domain. Impedance scan is simulated on the same PCB as well. We used Workflow Wizard, to run the initial checks and verifications.

 

 

SYZ Parameter Using SIWave

Scattering parameters or S-parameters describe the electrical behavior of linear electrical networks when undergoing various steady state stimuli by electrical signals. S-parameters are analytically convenient; they allow for calculations of system performance by cascading the individual components.

In this video, we used SIWave to calculate S and SYZ parameters. Different methods are shown to generate probes on the PCB and measure SYZ parameter. We also illustrated how to run an initial validation on the PCB, how to identify nets, and how to export results in Ansys Electronic Desktop (AEDT).

Webinar Series: Improving Electronic Reliability – Reliability Physics Analysis

 

Ozen Electronic Reliability Webinar Series Banner

The last 30-minute webinar in our Improving Electronics Reliability series focuses on reliability physics analysis.


Improving Electronics Reliability: Reliability Physics Analysis
July 7, 11:00 AM PT

Register here


This webinar will focus on the reliability physics associated with improving electronic reliability.

Goal:

  • PCB reliability
  • Reduce design cycle.
  • Standards compliance: IPC-TR-579, IPC 9704, SAE J3168, MIL, JESD-22 etc.

Solution:

  • Faster Pre-processing: 2D ECAD to 3D MCAD conversion at a click of a button
  • Exhaustive and expandable electronics components, materials and laminates library
  • Complete life curves for Electronics

Benefits:

  • 20-50% time reduction in PCB reliability prediction at Component, Board and System level
  • Optimized component selection and placement for target PCB reliability.
  • Meet regulations at reduced cost for various industry standards by reducing physical prototypes by ~50%

 

New Fluent Meshing Mosaic Technology

Transitioning between different types of mesh elements has always been a challenge for simulation software. Previously, tetrahedron and pyramid elements have filled this transition zone. However, they are not very accurate and create a dense mesh with many elements. ANSYS has addressed this issue by developing the polyhedral element. Polyhedral elements can take on any shape required to form a conformal mesh. This allows the transition zone to be filled with fewer and higher quality elements resulting in a better mesh and more accurate solution.

Released in Fluent 19.2, polyhedral elements solve simulation problems in less time, more accurately, and with lass RAM than previous meshes. The poly-hexcore mesh uses polyhedral elements in the transition zone with a hexahedral element core, providing the optimal combination of mesh elements. In CFD simulations, the poly-hexcore mesh improved solve time by 20 to 50 percent over a hexahedral core or polyhedral core mesh of the same accuracy. The benefits of this new meshing method will continue to improve as ANSYS refines how it uses the new polyhedral element.

 

By: Adam Remmel