Electrical

How LC Tank Circuits Resonate

Electrical Diagrams · made in Skemio

Circuit schematic of an AC source driving an input resistor alongside parallel capacitor and inductor branches.
Circuit schematic of an AC source driving an input resistor alongside parallel capacitor and inductor branches.
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What it shows

  • Capacitor electric fields swap energy with inductor magnetic fields.
  • At resonance, capacitive and inductive reactances cancel out.
  • Parallel tanks offer peak impedance at their tuned frequency.

The takeaway

LC tanks trade energy between field types to isolate exact target frequencies.

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