I'm looking for a circuit diagram of a three stage amplifier running on 9 volts. stage 1 needs to have a jugfet, stage 2 needs a bi polar transistor and stage 3 needs a push pull complementry Class AB Amplifier. Can anybody help?

 

Ask your teacher to help you.

 

AB amps have to have a bias current in order to have the output transistors conducting. For a 9 volt battery, this means about 0 useful lifespan. If your voltage source is more robust, then you can find stuff like this - http://www.circuit-diagrams.com/dg64-Headphone-Amplifier.php.