In the PCB design, we talk about the impedance of the trace. This is a very important PCB parameter and is crucial to the performance of the board. Impedance matching is critical part of high speed design. We will see how to understand the impedance of the trace.
- Inductance and Capacitance of the trace determine the impedance of the trace
- Capacitance of the trace is determined by it's distance to the ground plane
- Inductance of the trace is determined by it's width
The PCB trace circuit model can be approximated as:
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