You will use AC Analysis to determine its frequency response.Ĭomplete the following steps to configure and run an AC Analysis: This is a fourth-order Butterworth low-pass filter with a cutoff frequency of 500 Hz and a passband gain of 10 (20 dB) this circuit was taken from. Digital components are treated as large resistances to ground.Ĭonsider the circuit shown in Figure 1.

AC circuit response is calculated as a function of frequency.Īssumptions: The analysis is applied to an analog circuit, small-signal.

If the Function Generator is set to a square or triangular waveform, it will automatically switch internally to a sinusoidal waveform.All input sources are considered to be sinusoidal, their frequency is ignored.Nonlinear components are represented by linear AC small-signal models, derived from the DC operating point solution.AC sources, capacitors, and inductors are represented by their AC models.Multisim constructs this matrix using the following approach: A complex matrix, containing both real and imaginary components is created.DC operating Point Analysis is performed to obtain the small-signal models.Multisim performs AC Analysis using the following process: The result of an AC Analysis is displayed in two parts: gain versus frequency and phase versus frequency. Then, the equivalent circuit is analyzed from a start to a stop frequency. In AC Analysis, the DC operating point is first calculated to obtain linear, small-signal models for all nonlinear components. AC Analysis is used to calculate the small-signal response of a circuit.

Doing bode plots on multisim