Electrical Engineering › Section L · Power (ac) and resonance › Topic L.7
Parallel resonance
Put the inductor and capacitor side by side instead of in a row and resonance turns inside out: the impedance peaks instead of dipping, and a large current circulates inside the pair while the source supplies only a trickle. This tank circuit sits at the heart of oscillators and tuned amplifiers.
In this topic
- Resonance turned inside out
- The practical tank circuit
- Two resonant frequencies
- The high-Q approximations
- Current magnification
- Response and phase
- Worked example: a low-Q tank
- Worked example: a tuned amplifier stage
- Applications and stray resonance
- Common mistakes to avoid
- Key takeaways
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