Puzzling about LM741

Discussion in 'General Electronics Chat' started by HaPPy_BoY, Mar 17, 2011.

  1. HaPPy_BoY

    Thread Starter Member

    Dec 5, 2010
    36
    0
    Hi . I checked around on how to do an inverting amplifier but on simulation and on practical, step-by-step, I don't seem to get the "correct" signal from it . I wonder what could went wrong
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    What do you imagine the correct signal is?

    The 741 is only specified for bipolar operation with +/-15 VDC applied. Check the data sheet. The design was done in 1968 and has not been changed.

    You have the non-inverting input to ground through 10K, and a gain of 1 as set by R1 & 2. The inverting input has +12 volts applied, so the output should be -12 volts.

    However, pin 4 is tied to ground, so the output can't swing negative. Even if you supply -12 volts, the output can't swing much past 10 volts. Read the data sheet.
     
    HaPPy_BoY likes this.
  3. HaPPy_BoY

    Thread Starter Member

    Dec 5, 2010
    36
    0
    i see . Thanks , now I know more of it
     
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