hi
can you help me with my problem ...
what is the different between the pnp transistor and npn in application??

 

Try this section in our Ebook - http://www.allaboutcircuits.com/vol_3/chpt_2/8.html

 

thank s it good but it talk about transistor and the different in operation but i mean the different in application

 

Here is a link to an example - http://www.ecircuitcenter.com/circuits/pushpull/pushpull.htm