Chapter: Analog and Digital
Figure: Phasor Diagram for AM with tonal modulation.
In the animation below, we demonstrate the phasor motion for AM with tonal modulation. The three blue phasor represent
Note that the quadrature phase component of the resulting signal (in black) is always zero, and that the inphase component is always non-negative.
JavaTM Applet: Phasor diagram of a carrier with AM tone modulation.