Instrumentation amplifier

Discussion in 'General Electronics Chat' started by Blackbull, Jan 25, 2010.

  1. Blackbull

    Thread Starter Well-Known Member

    Jul 26, 2008
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    I breadboarded the instrumentation amplifier, from the AAC e-book Vol 111 chapter 8, using three LT1007 op-amps, 1k resistors and with no gain resistor for a gain of 1. With 49mV at V1 and V2, Vout is around 780mV. Any ideas as to what is wrong. Many thanks.
     
  2. Wendy

    Moderator

    Mar 24, 2008
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    Please post a schematic, it is much better than words.
     
  3. SgtWookie

    Expert

    Jul 17, 2007
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  4. Blackbull

    Thread Starter Well-Known Member

    Jul 26, 2008
    70
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    The cavalry turns up! Thanks Sgt. you are a gentleman.
     
  5. hgmjr

    Moderator

    Jan 28, 2005
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    I am not sure what you mean when you say no gain resistors. Please clarity.

    hgmjr
     
  6. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    I assume that means Rgain=∞. That would make the gain=1.
     
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