Problem with 8038

Discussion in 'The Projects Forum' started by Wankel, May 7, 2008.

  1. Wankel

    Thread Starter New Member

    May 7, 2008
    I have make a oscillator circuit to produce a square,sine and triangular wave .I got the the NTE864 but i dont know how vary the output voltage.
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    If you had the data sheet on the ICL8038, you would be aware that the output magnitudes are fixed. You will need an op amp buffer as the means of controlling the output voltage for any of the waveforms. The sine output is very limited - it won't be happy with any resistance under 100K ohms.
  3. SgtWookie


    Jul 17, 2007
    Following on what Beenthere said, you should look at using low-noise FET-input opamps that have a broad bandwidth.

    If you need more than a few mA output current, you might consider using a Linear Technology LT1010 +/-150mA fast power buffer in the feedback loop of the opamp.