The frequency response analysis calculates the small-signal response of the circuit, linearized around the bias point, to a combination of inputs.
    AC sweep
  An AC Sweep analysis is a linear or small-signal analysis. PSpice A/D computes Small-signal response of the circuit (linearized around the bias point) when sweeping one or more sources over a range of frequencies. Outputs include voltages and currents with magnitude and phase; you can use this information to obtain Bode plots.
    The simulation results for decibel (dB) gain vs. frequency are presented in the figure shown below