LTspice - 3 ways how to get an AM - amplitude modulated signal.

Let's have a sinus carrier of 1000 kHz from medium waves range and a modulating 1 kHz sinus wave.
We can modify frequency of carrier, modulation frequency and modulation depth.

1. AM signal as an addition of carrier and 2 side waves:

Using 3 sinus voltage sources parallel or in series:

AM signal as an addition   AM signal as an addition

2. AM signal as a multiplication of carrier and modulating wave:

Using 2 sinus voltage sources and one behavioural voltage source.

AM signal as a multiplication

3. AM signal using A-device MODULATE from Special functions library:

Using A-device MODULATE as an amplitude modulating device.

AM signal using A-device MODULATE