Amplifier Stage Coupling

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

 

try a capacitor
put your design to take a look

 

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:

 

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!