Simulate DC/DC power noise damped sinewave in Orcad 9.2

[moro]

Hello,

i am trying to create a damped sine wave like the noise generated from a pwm power stage.

The waveform must look similar to this


Is this posible in Orcad simulation ?

 

[BradtheRad]

Your waveform resembles 'ringing' like the kind created by resonant action in a loop formed by an inductor and capacitor. Install a resistor in series so that the ringing decays after a few cycles.
A ringing circuit needs a 'kick' to start oscillations. You can start with a charge on the capacitor, or deliver a pulse through a switch, etc.