A signal flow diagram describing ring modulation with sinusoidal oscillators is shown in Fig. 3.
Figure 3:
A signal flow diagram for ring modulation.
Ring modulation is a special case of AM with no “DC” component applied to the carrier frequency amplitude input. The resulting spectrum lacks a frequency component at the carrier frequency, as shown in Fig. 4.
Figure 4:
The resulting ring modulation spectrum using sinusoidal carrier and modulating waveforms.