inverting amplifier

Discussion in 'General Electronics Chat' started by PG1995, Aug 12, 2011.

  1. PG1995

    Thread Starter Active Member

    Apr 15, 2011
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  2. SgtWookie

    Expert

    Jul 17, 2007
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    Here is a link to a datasheet for the LM741; an ancient opamp (40+ years old) but still in use, mostly by the educational system:
    http://www.national.com/ds/LM/LM741.pdf
    There is a schematic of the opamp on page 4. You'll see that on the inside, it's mostly transistors, some resistors, and a few capacitors.
    That triangle symbol is used for both operational amplifiers and comparators. Comparators are similar to opamps, but different; opamps are used more for accurate amplification of signals, while comparator outputs change states very rapidly when the input voltages cross each other. Opamps are sometimes used as comparators, but they are much slower than the real thing. Comparators make very poor opamps.

    Here is an animated tutorial on opamps:
    http://holbert.faculty.asu.edu/ece201/opamp.html
     
  3. bertus

    Administrator

    Apr 5, 2008
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  4. PG1995

    Thread Starter Active Member

    Apr 15, 2011
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    Thanks a lot, Sgt.

    @Bertus: Thank you for the link.
     
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