Minimum Versions: SmartSpice 4.6.5.R
The
input deck shows how you can setup a single voltage source element to have a Amplitude Modulated sinewave output.
A plot of the
waveform
shows the low-frequency modulation of the higher frequency sinewave signal. The example facilitates how you can study bursts
of a signal into your circuit and the circuit’s subsequent recovery/stability.
Graphics

Input Files
AM_mod_2.in
** Experimental Modulation deck - Single element. cs **
.param fm =20K
V1 1 0 am(1 1 1k FM 0)
R1 1 0 1
.tran .05U 50m ;sweep fm 5k 20k 5k
.fft v(1) np=4096
.option fft_accurate
.end