summing amplifier

Discussion in 'Homework Help' started by dezl26, Mar 24, 2013.

  1. dezl26

    Thread Starter New Member

    Mar 24, 2013
    2
    0
    I am having trouble calculating vout/vin
     
  2. panic mode

    Senior Member

    Oct 10, 2011
    1,318
    304
    you came up with

    Vout = -(V1+V2)

    Then

    Vout/Vin = -(V1 + V2) / Vin

    so, did you decide what voltage is Vin?
     
  3. WBahn

    Moderator

    Mar 31, 2012
    17,715
    4,788
    What is Vin?

    Check your units. The last line of your work is not dimensionally consistent -- the left hand side (both left hand sides?) are dimensionless while the right hand side has units of voltage, so you KNOW it is wrong.
     
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