Biasing Circuit. Establish a constant voltage V B. Current-derived negative feedback.The degree of success of the negative feedback is Bias Stability. cut-off conditions ,. Example.
Also, VB = VRE + VBE = 3.4 + 0.6 = 4 V.
VR1 = VCC – VB = 12 – 4 = 8 V
Transconductance=how much ICchanges with a
fluctuation in VBE.
In practice, VT = 26 mV at room temperature
The terminal voltage gain is therefore