LCáramkörök

LC áramkörök, also known as resonant circuits or tuned circuits, are electrical circuits consisting of an inductor (L) and a capacitor (C) connected together. When combined, these two components exhibit a resonant frequency, a specific frequency at which the circuit will oscillate at maximum amplitude. This phenomenon arises from the energy exchange between the inductor's magnetic field and the capacitor's electric field. At resonance, the inductive and capacitive reactances cancel each other out, leading to a purely resistive impedance.

The resonant frequency (f₀) of an LC circuit is determined by the values of the inductance (L) and capacitance (C) according to the formula f₀ = 1 / (2π√(LC)). This property makes LC circuits fundamental in many electronic applications. They are widely used in radio frequency circuits for tuning, filtering, and signal generation. For instance, in a radio receiver, an LC circuit can be tuned to resonate at the frequency of a desired radio station, allowing it to be selected while rejecting others. In oscillators, LC circuits are employed to create continuous oscillating signals at a specific frequency. The quality factor (Q) of an LC circuit describes how sharp the resonance is, with higher Q values indicating a narrower bandwidth and more selective tuning.