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  1. #1
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    Switched mode power supply

    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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    Re: Switched mode power supply

    Because you said the scope was AC coupled.



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    Re: Switched mode power supply

    Quote Originally Posted by barry View Post
    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.


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  4. #4
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    Re: Switched mode power supply

    Quote Originally Posted by rajasekharnbkrist View Post
    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
    When you sensed that i can help you , feel free to ask me .
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    Experience is a good professor of mine !
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    The only thing that i couldn't understand yet , is why humans should fight together ? why not helping each other to have a better world ?



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