Applications
The resonance effect of the LC circuit has many important applications in signal processing and communications systems.
- The most common application of tank circuits is tuning radio transmitters and receivers. For example, when we tune a radio to a particular station, the LC circuits are set at resonance for that particular carrier frequency.
- A series resonant circuit provides voltage magnification.
- A parallel resonant circuit provides current magnification.
- A parallel resonant circuit can be used as load impedance in output circuits of RF amplifiers. Due to high impedance, the gain of amplifier is maximum at resonant frequency.
- Both parallel and series resonant circuits are used in induction heating.
LC circuits behave as electronic resonators, which are a key component in many applications:
- Amplifiers
- Oscillators
- Filters
- Tuners
- Mixers
- Foster-Seeley discriminator
- Contactless cards
- Graphics tablets
- Electronic Article Surveillance (Security Tags).
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