When designing PCBS, we often rely on previous experience and tips found on the Internet. Some rules are universal at design time, while others are limited to specific designs.
For example, ADC PCB rules do not apply to RF and vice versa. However, certain guidelines can be considered universal for any PCB design. Today to Kangkang some can significantly improve the PCB design of the basic problems and techniques.
1. Power supply and signal distribution
Distribution is a key element in any electrical design. All components rely on strength to perform their functions. Depending on your design, some components may have power connections, and some components on the same board may have poor power connections.
For example, if all components are powered by a single wire, different impedances will be observed for each component, resulting in multiple ground references. For example, if you have two ADC circuits, one at the beginning and one at the end, and both ADCs read an external voltage, each analog circuit will read a different potential relative to themselves.
We can summarize the power distribution in three possible ways: single point source, star source, and multiple point source.
(a) Single point power supply:
The power and ground wires of each component are separated from each other, and the power lines of all components meet only at a single reference point, which is considered to be suitable for power. However, this is not feasible for complex or large/medium projects.
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