ckck20 said:For easier reference let's use numbers: Vbe=0.7V b=100
Let's also assume Vin2=0.8V and we need to find the maximum value for Vin1 for which transistor 1 is OFF.
After doing what you said I ended up that Vin1max=0.8V. Therefore if Vin1<0.8V T1=OFF.
Now, if we have Vin1=0.7+0.1sin(2 pi f t) (DC+AC) according to what we found earlier T1 should be always off because Vin1 is between 0.6 and 0.8V. Right?
BUT Pspice gives me that T1=ON when sin(..)>0 =>Vin1=[0.7 , 0.8].
Where's the mistake?
ckck20 said:Vbe1 and Vbe2
Shouldn't this be constant 0.7V? How can i "force" it to be 0.7V?
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