hi
i have a problem in simulating this circuit with pspice
i try to simulate a differential amplifier with the two bjt and i use dc sweep for my voltage source as a simulatian but there is no result and has error of floating nodes.
Would anybody plz help me with running this ?
tnx alot

 

You may have used an "earth" symbol that only joins connections together, but does not establish a true reference ground. The PSpice ground I have used shows a "0" symbol.

 

hello,here is my design,it's supposed to have an output Voltage +-7.5 V peak to peak but I don't know how can I simulate the project to Ac Analysis