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IC that calculates the integral of a function?

Discussion in 'Electronic Basics' started by Igor Carajo, Jan 16, 2004.

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  1. Igor Carajo

    Igor Carajo Guest

    Hi,

    I was hoping that someone would be able to help me. I have an
    electrical signal that varies from 0V to 12V. I want to find an IC
    that will integrate the function defined by the signal from time=t0 to
    t1. In other words, if I were to plot my signal for a period of time,
    say 0.1 seconds, I want to calculate the area under the curve. Thanks
    in advance for any information.
     
  2. An operational amplifier with capacitive feedback and the signal
    applied to the inverting input through a resistor produces the
    negative of the integral. A second opamp can invert that back to the
    true integral. Normally, the integral is set to zero at time zero by
    shorting the capacitor with a field effect transistor or reed relay
    contact.

    See:
    http://www.ecircuitcenter.com/Circuits/opint/opint.htm
     
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