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  3. problem 3 30 points given the commoncollector amplifier cc...

Question: problem 3 30 points given the commoncollector amplifier cc...

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Problem # 3

(30 points)

Given the common-collector amplifier (C.C.) in figure 3, determine:

a. The emitter current IE,

b. The collector current IC,

c. The collector-emitter voltage VCE, knowing that βdc = βac = 80.

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

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

    output voltage gain AV.

Hint: use Thevenin equivalent circuit approach.

R1 500k R2 50k Vcc 20V ut RE 0.5k

                      Figure 3

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