Assume that R S R C 50k brvbar in Problem 3 2, and calculate the optimum I C What is the dc voltage drop across R C What is the voltage gain In problem 3 2 A CE transistor is to be used in the amplifier of Fig 3 72 with a source resistance R S and collector resistor R C First, find the overall small signal gain v o v i as a function of R S , R C , Icirc sup2 0 , V A , and the collector current I C Next, determine the value of dc collector bias current I C that maximizes the small signal voltage gain Explain qualitatively why the gain falls at very high and very low collector currents Do not neglect r o in this problem What is the voltage gain at the optimum I C Assume that r b 0 Figure 3 72 Vcc RC Vo Rs Vi

Question: Assume that R S = R C = 50k ¦ in Problem 3.2, and calculate the optimum I C . What is the dc voltage

Assume that R_S= R_C= 50k „¦ in Problem 3.2, and calculate the optimum I_C. What is the dc voltage drop across R_C? What is the voltage gain?

In problem 3.2

A CE transistor is to be used in the amplifier of Fig. 3.72 with a source resistance R_S and collector resistor R_C. First, find the overall small-signal gain v_o/v_i as a function of R_S, R_C, Î²₀, V_A, and the collector current I_C. Next, determine the value of dc collector bias current I_C that maximizes the small-signal voltage gain. Explain qualitatively why the gain falls at very high and very low collector currents. Do not neglect r_o in this problem. What is the voltage gain at the optimum I_C? Assume that r_b = 0.

Figure 3.72

Vcc RC Vo Rs Vi

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