PCB manufacturer:Annular Rings in High-Speed Circuits
As PCB manufacturer knows that,the annular rings in a via create a parallel plate capacitor, which affects the via impedance. This implies that more rings along the via barrel, either functional or non-functional, raise the parasitic capacitance of the via. Furthermore, this will decrease the via’s impedance and move it closer to the trace impedance. Therefore, you should carry out impedance matching on primary traces and components.
Any non-functioning stub available at the via end contains a set of resonance frequencies as high-speed digital signals and high-frequency AC signals spread through the via. Since more non-functional pads along the via barrel raise the PCB capacitance, they reduce the quarter wavelength resonance frequency of the via stub. This further intensifies the via insertion loss and lowers the signal quality.
The best strategy of preventing via stub resonance is back-drilling the stub to achieve the smallest size. You can then set the lowest order resonance frequency of the via stub higher than the signal working frequency. This will subdue the via stub resonance. Non-functional pads along the barrel minimize the lowest order resonance frequency and eliminate the standard method used to prevent insertion loss issues.
Other news about S&L
- Good News! Sun&Lynn Circuits Co.,Ltd. is honored as one of the Top 100 Innovative Enterprises in Bao
- What Should You Know about Metal Core PCB
- FPC supplier : the types of Flexible PCB
- PCB manufacturer China:Why PCB board snake line, what is it used for?
- What is Metal Core PCB and types of Metal Core PCB?
- Why are High frequency PCBs much more expensive than normal PCBs?
- Flexible PCB supplier China :When to use flexible PCB?
- Flexible PCB manufacturer:What Is Flex Soldering?
- What Is Automotive PCB? Why we use automotive PCB?
- Are Multi-layer PCB perfect for your electronic device?
Your browsing history
- PCB factory china:These inspections are indispensable before the PCB is shipped
- What are The Advantages of Metal Core PCB?
- Automotive PCB manufacturer:Chinese PCB suppliers are moving production to Thailand
- Automotive PCB:SpaceX moon mission billionaire reveals who might get a ticket to ride Starship
- What Should You Know about Metal Core PCB?
- Lamination machine
- Metal core PCB:Classification and Features of PCB
- PCB factory china tells you how to fix PCB warpage
- Metal core PCB:Why does delamination happen?
- PCB factory china:How are Layers Connected in Multilayer PCB
A total of -comments【I want to comment】