Parallel Resonance or Current Resonance or Anti-Resonance
The basic parallel-resonant circuit is shown in the figure. We want to observe how the steady state amplitude and the phase angle of the voltage vary with the frequency of the sinusoidal current source. As the frequency of the source changes, the maximum amplitude of the source current (Im) is held constant.
Parallel RLC Resonant Circuit
In this circuit, the impedance is given by,