A via is a small hole on a PCB that connects different layers electrically. Structurally, a via consists of a drill hole and a pad.
High-frequency choke: When wiring the high-frequency circuit board in the high-frequency PCB design, a high-frequency choke device must be connected when the digital ground, analog ground, etc. are connected to the common ground line. Generally, it is a high-frequency ferrite bead with a wire passing through the center hol