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need your help in designing an Operational Amplifier circuit

Discussion in 'Electronics Homework Help' started by samy555, May 18, 2010.

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  1. samy555

    samy555

    63
    0
    May 11, 2010
    need your help in designing an Operational Amplifier circuit
    Hello
    I need your help in designing an Operational Amplifier with these conditions:
    The i/p signal changing from Vmax= 80 mv to Vmin=60 mv, the o/p must be Vout = + 5 V when Vmax= 80 mv and Vout = - 5 V when Vmin=60 mv
    thank you very much
     
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,477
    2,820
    Jan 21, 2010
    Sounds very specific, what is this for?
     
  3. samy555

    samy555

    63
    0
    May 11, 2010
    it is a homework
     
  4. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,477
    2,820
    Jan 21, 2010
    In that case you need to post it here.

    Now explain to us what you *do* understand of the problem, and where *exactly* you are stuck.

    Also the *exact* wording of the question if it is not as you provided above.
     
  5. samy555

    samy555

    63
    0
    May 11, 2010
    I think that if i use a comparator with dual power supply + and - 5 volts and adjusted to change its o/p when Vin less than 80 mV
    but the instuctor need it that change the o/p when Vin drop to 60mV
    pleas help me
     
  6. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,477
    2,820
    Jan 21, 2010
    Well, I'll just presume that what you originally posted is the question exactly as it is stated...

    There is a continuum of solutions between a comparator that switches state at around 70mV and a DC amplifier with 0 V output at 70mv input, swinging to +/- 5V as the signal moves 10mV in either direction.

    If you're presuming that it's a comparator that's required, fine -- Now what exactly are your problems in designing the circuit?
     
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