IGBT and router: what they have in common

1. Step 1. IGBT — uses — P–n junction. A transistor structure with p–n junctions.
2. Step 2. P–n junction — is used in — Diode. A semiconductor diode is a p–n junction.
3. Step 3. Diode — is part of — Crystal radio. A crystal detector is a diode.
4. Step 4. Crystal radio — has part — Antenna. An antenna.
5. Step 5. Antenna — is part of — Router. Antennas.

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