op-amp

  1. Q

    Input requested for DIY Mixer-Preamp

    Hello - I'm working on an updated version of my mixer-preamp-amp and want input/comments on the mixer-preamp stage. For background, the application is audio input from two computers plus a 3rd aux input, and output to a couple of 6 ohm monitors. This device allows variable mixing of the three...
  2. S

    Problem when measure square wave and Charge & Discharge

    Please help me, I got problem. From circuit diagram Target : I want to make square wave on Vout (Period =18 sec on :8 sec off: 10 sec) I have problem when I use scope to measure triangle and Vout , I have followed target. But when I use scope to measure Vout only, time Period and time on reduce...
  3. W

    TI IEPE Reference Design

    Hi, i am trying to understand and develop my own simplified version of iepe signal conditioning circuit. however, i have been reading TIDUD62 and following TIDRRP9 documents and couldn't figure out few things as i am not an expert with Op-Amps. i have basic understanding of analog electronics...
  4. M

    Square wave using LM319 Comparator.

    Hi People, I am using an LM 319 High Speed Comparator to produce high frequency square wave as shown. However, from the first diagram, I assembled the connections based on second diagram, it does not work. The V+ and V- that is negative rail and positive rail I used is +9 and -9 V from 2...
  5. The best op-amp IC chip for a beginner?

    Who can tell me what's the best op-amp IC chip? I am a beginner
  6. J

    Aviation headset test circuit - op amp

    I have put together an overly complicated headset tester with hopes to expand it to a intercom station. But it doesn't work as I wish. No mic audio is audible in the headset. I am using a standard aviation headset David Clark H3312 with a 600ohm load. Have I overlooked something very obvious...
  7. Convert bipolar Op-amp schematic to single source Op-amp

    I want to build Colpitts Oscillator Op-amp Circuit from here **broken link removed** In the schematic it uses classic Op-amp 741 with 2 voltage sources. I have only Op-amp LM358 which using single voltage source. What changes i need to do to schematic to make it work. Imega from website...
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