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Amplitude Ratio: Calculator

  • Ar = 20 *Log 10 ( Am, Output / Ar Input)

    • Answer: Amplitude Ratio, Ar ( in dB) =

    Ar, in dB, dB Given = 20 *Log 10 ( Am/ Ar Input )
    Amplitude measured or output amplitude, Am =

    Where do I used this formula ? Below are the common application of this formula

    1. Application of formula: Find the output voltage for a system with input voltage ( amplitude ) of 5V and voltage gain of 6 dB. Using the above calculator : Answer the output voltage needed must be 9.976 V or 10 V.

    2. Application of formula: Find the output current for a system with input current ( amplitude ) of 5A and current gain of 7 dB. Using the above calculator: Answer the output current needed must be 11.19 A or 11.2 A

Where: Ar = Amplitude ratio is the ratio of output to input amplitude.

Am= Amplitude measured or output amplitude

Ar = Amplitude at reference value or input amplitude.

 

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Web Sites Started 4/27/2009. Updated 04/27/2013