Problem with PWM signal, Please Help!

[justinycc]

Hi all,

I am designing a PWM signal where its output is going to connect 4 optocouplers to drive a H-bridge MOSFETs. However, I am now having a problem of getting an output signal strong enough to drive the optocoupler. 

I have attached the Multi-Sim file along with this post. Please feel free to help me to solve this problem thank you.

The version of Multi-Sim I am using is 10.0.144

 

[ThomasC]

Hi Justin,

I am slightly confused as to whether this is a problem with Multisim or the design of your circuit.  Are the components in Multisim behaving in an unexpected manner in comparison to their real-world counterparts?

Regards,

Thomas Clark