Amplifier Stage Coupling

Discussion in 'General Electronics Chat' started by KCHARROIS, Aug 31, 2012.

  1. KCHARROIS

    Thread Starter Member

    Jun 29, 2012
    292
    1
    Hello everybody

    I have a question regarding amplifier coupling. My first stage is a differential amplifier using 2n3904 then coupled to a class A amplifier and I get about a 10 Vpp output. So how do you couple the class A to a class AB amp?

    Thanks
     
  2. samy555

    Active Member

    May 24, 2010
    116
    3
    try a capacitor
    put your design to take a look
     
  3. Audioguru

    New Member

    Dec 20, 2007
    9,411
    896
    Modern audio amplifiers are DC-coupled with no coupling capacitors except maybe at the input and at the output. They might have a capacitor to ground in the negative feedback loop to prevent amplification of DC.

    Here is a simulated example:
     
  4. ramancini8

    Member

    Jul 18, 2012
    442
    118
    A differential amplifier is normally used to reject common mode signals or dc. Do you really need a diff amp? You should be able to calculate the voltages and currents at the diff amp outputs, but we can't help you because you didn't supply a schematic. GIGO!
     
Loading...