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Multisim and Ultiboard

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square oscillator

square oscilator

 

the circuit didn't work what's the probleme plz help me

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You posted in the wrong forum. I try to have the moderator move your post to the correct place.

 

(the feedback forum is for discussions of forum issues)

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What did not work? What did you try?

 

SPICE simulators tend to not model the start up behavior of oscillators well. Try setting an initial condition on the voltage on C1 so that the first transition is forced.

 

Lynn

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