11.5 SINUSOIDAL STEADY-STATE FREQUENCY RESPONSE OF FIRST-ORDER RC CIRCUITS
The concept of sinusoidal steady-state frequency response was already introduced in chap. 10 in the context of RL circuits. Essentially, we apply a sinusoidal input of suitable amplitude to a circuit and wait for enough time for the transient response to die down. After steady-state is satisfactorily established in the circuit, we measure the amplitude of output and its phase with respect to the input sine wave. We repeat this process for various values of frequency of input. We ensure that the circuit is in steady-state before we measure the output every time. The data so obtained is plotted to show the variation of ratio of output amplitude to input amplitude and phase ...
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