Back to this little amplifier

Discussion in 'General Electronics Chat' started by chunkmartinez, Feb 19, 2013.

Thread Status:
Not open for further replies.
  1. chunkmartinez

    Thread Starter Senior Member

    Jan 6, 2007
    Okay guys, I recently posted about this circuit:

    Come to find thanks to audioguru, the op amp dosn't supply enough current, 5mA.

    So basically, can anyone draw me up a circuit of what you would do to replace the op amp? What I have available is little bc547 NPN bjts. Should I keep the op amp and add the little 547s in between the op amp and TIP transistors? What values would be good to use?

    I need 100mA supplied to the output stage right? These components names here and general components like caps and resistors is what I already have on tap to use and I would like to stay with what I have.

  2. THE_RB

    AAC Fanatic!

    Feb 11, 2008
    It's annoying to start a thread where you then make people go and open another thread!

    I assume you want to make an amplifier using BC547 transistors?

    If so, please state what the input signal is, what the amp will drive (ie speaker type), how loud you need it to be etc etc.

    Once people know that they can suggest an amp type you can build with your transistors, or suggest better transistors or ICs.
  3. bertus


    Apr 5, 2008
Thread Status:
Not open for further replies.