1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Linear Inverting Amplifier Help

  1. Sep 14, 2014 #1
    1. The problem statement, all variables and given/known data
    A linear inverting amplifier has these characteristics:
    -5.0V < vo < +5.0V Av=35 dB
    The output rails at -5.0V and +5.0V That is, the amplifier outputs no voltage larger in magnitude than 5.0V.

    What is the gain in V/V?
    What is the output if vi=-8.0V?


    2. Relevant equations
    Av = vo/vi
    Av = 20log|Av|


    3. The attempt at a solution
    Av = 35db
    35/20 =log|Av| => Av = e^(7/4) V/V
    vo = Av * vi => (-8.0V) * e^(7/4)
    but since this is out of the -5V to 5V range, it would just be 5V

    Does this look right?
     
  2. jcsd
  3. Sep 14, 2014 #2

    gneill

    User Avatar

    Staff: Mentor

    Watch it! The log is base 10, not base e. And you should be able to write a numerical value for a result.

    Yup. The input already exceeds the output range and the gain is greater than unity.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Linear Inverting Amplifier Help
  1. Inverting Amplifier (Replies: 3)

Loading...