half subtraction by using TTL circuit

tamtoma

New Member
plz help me,am design subtraction circuit in OrCAD software, to do it as hardware circuit..
when iam simulated it, if input was a=5,b=5 the output DIFF=5 and BORROW=5

plz help me soon to found the error ..

**broken link removed**
 
Is not looking good. I see no inputs, no outputs, transistor bases biased with 10 ohm resistors, no voltage source voltage values.

You are making a joke, right?
 
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