The input impedance to a common-emitter transistor amplifier is 1.2 kΩ with β = 140, ro = 50 kΩ, and RL = 2.7 kΩ. Determine:
a. re.
b. Ib if Vi = 30 mV.
c. Ic.
d. Ai = Io/Ii = IL/Ib.
e. Av = Vo/Vi.
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