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Switched mode power supply

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rajasekharnbkrist

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1.The output of 12V SMPS is monitored in an oscilloscope with AC coupling enabled and with appropriate setting of time base and amplitude. What will be the waveform observed in the oscilloscope ?

ans) Ripple alone

can u please explain how did you get ripple alone
 

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Because you said the scope was AC coupled.
To further clarify in AC coupling mode you are blocking the DC component of the 12V SMPS output.

Take a look at this for more about AC coupling.
 

goldsmith

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1.The output of 12V SMPS is monitored in an oscilloscope with AC coupling enabled and with appropriate setting of time base and amplitude. What will be the waveform observed in the oscilloscope ?

ans) Ripple alone

can u please explain how did you get ripple alone

Hi
What you have done , is a way that everybody will use to see ripple voltage and noise , separately .
Technically consider that mode , equivalent to a series capacitor with signal . Ac will go through and dc will block .

Best wishes
 

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