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Simulate DC/DC power noise damped sinewave in Orcad 9.2

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moro

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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
DS1Z_QuickPrint11.png

Is this posible in Orcad simulation ?
 

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.
 

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