I'd like to ask about BJT biasing. Why we don't bias BJT by using a battery connected Band E that has a constant voltage?
Vbe = Vbattery = constant and its operating point Q is fixed.
I'd like to ask about BJT biasing. Why we don't bias BJT by using a battery connected Band E that has a constant voltage?
Vbe = Vbattery = constant and its operating point Q is fixed.
1.) The value of Vbe that is necessary for a particular Ic value is not known with sufficient accuracy because of very large tolerances
2.) Q is not "fixed" because of large Ic deviations caused by temperature changes
3.) The input impedance of the amplifier would tend to zero