DEPARTMENT OF ELECTRICAL ENGINEERING
Example of SPICE simulation of a first order filter (AC Analysis)
This is an example of a first order filter and the use of the AC analysis to find the frequency response of the magnitude and phase of a transfer function.
The Spice input file is given below. The opamp has been modeled as a voltage controlled voltage source (gain of 1E8), infinite input resistance and zero output resistance (ideal opamp). The input voltage V1 has a value of 1V so that the AC plot of the output voltage v(3) corresponds to the transfer function T(jw)=Vo/V1