Electrical – Is this push pull amplifier wrong

push-pull

Under the following tutorial:

http://www.allaboutcircuits.com/textbook/semiconductors/chpt-4/biasing-techniques-bjt/

They explain push pull operation. But should't negative terminal be separate with the ground? Dont we need +Vcc and -Vcc

Here is the push-pull from the tutorial:

http://sub.allaboutcircuits.com/images/03126.png

EDIT: here is my simulation:

enter image description here

Green is input, red is output.

Best Answer

But should't negative terminal be separate with the ground? Dont we need +Vcc and -Vcc

No, that would work providing the load is connected via an output coupling capacitor: -

enter image description here

Here's another: -

enter image description here

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