Simulation of the Frequency Response with LTspice Further advantages of the logarithmic representation are the larger frequency range of the plot and the identical relative precision over the entire curve. The phase responses can be additively superposed even without the logarithmic scale. If there are several partial transfer functions, the actual multiplication of their amplitude responses is simplified to an addition through the decibel scale. The amplitude response is given in decibels, so it is possible to construct complex Bode plots by superposition of simple subplots. For this, the amplitude response and the phase response are determined from the transfer function of the system and plotted as a graph with the gain and the phase as a function of frequency. This is called the frequency response of the system. For the development of dynamic systems in electrical engineering, control engineering, and even mechatronics, the steady-state response at the output of the system to harmonic excitation (sinusoidal oscillation) at the input often must be known.
