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  3. problem 2 40 points for the commonbase amplifier cb...

Question: problem 2 40 points for the commonbase amplifier cb...

Question details

Problem # 2:

(40 points)

For the common-base amplifier (C.B.) in figure 2, characterized by a BJT with βdc =90, determine:

a. The emitter-current IE and the base-current IB

b. The collector-emitter voltage VCE

c. The collector-base voltage VCB

d. Sketch the AC equivalent circuit, using the re model for the common-base BJT, and

    determine: The input impedance Zi, the output impedance Zo, assuming ro = ∞ and the open-

    output voltage gain AV.

Vin 2.2K 4.5V H out 4.7k 12V

                                            Figure 2

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