need some help! how to calculate the input signal power in dB given the ff. value...

Discussion in 'Homework Help' started by zian, Feb 8, 2011.

  1. zian

    Thread Starter New Member

    Feb 8, 2011
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    Signal voltage, Sin=100u Vrms
    Resistor = 50 ohms

    im confuseif im going to use Vrms or Vp... urgent please help
     
  2. zian

    Thread Starter New Member

    Feb 8, 2011
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    need help... for my assignment
     
  3. JoeJester

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    Apr 26, 2005
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    zian likes this.
  4. zian

    Thread Starter New Member

    Feb 8, 2011
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    tnx sir joejester!
     
  5. zian

    Thread Starter New Member

    Feb 8, 2011
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    should i convert Vrms to Vp (Vp=Vrms/√2) to solve the input power?
     
  6. t_n_k

    AAC Fanatic!

    Mar 6, 2009
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    You have already stated in your first post that the sinusoidal voltage is 100uV RMS. Why would you bother calculating Vp? Also, Vp is not given by

    Vp=Vrms/√2

    Rather

    Vrms=Vp/√2

    and Vp=√2xVrms.

    Use the given rms value of 100uV for your calculations.
     
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  7. JoeJester

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    Apr 26, 2005
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