

Reactive circuits need careful analysis to determine how they interact with signals of different frequencies. The phase is one of two pieces of information shown in a Bode plot, where the output voltage is shifted in time with respect to the input voltage.Īs reactive components, inductors and capacitors induce a phase shift in a filter or amplifier circuit, creating a phase shift that can be seen in a Bode plot.

When a phase shift is introduced into a filter or amplifier, the magnitude of the phase shift and attenuation/gain can be determined over a range of frequencies. Reactive components in LTI systems will produce a phase shift between the current and voltage in the component.
