24. Determine the bandwidth of the amplifier in Figure...

24. Determine the bandwidth of the amplifier in Figure 10-59. FIGURE 10-59 $V_{in}$ $V_{cc}$ \\ $+9 \text{ V}$ $\beta_{DC} = \beta_{ac} = 125$ $C_{be} = 25 \text{ pF}$ $C_{bc} = 10 \text{ pF}$ $R_c$ $220 \Omega$ $C_3$ $V_{out}$ $R_1$ $12 \text{ k}\Omega$ $C_1$ $1 \mu F$ $R_L$ $680 \Omega$ $R_s$ $50 \Omega$ $1 \mu F$ $R_2$ $4.7 \text{ k}\Omega$ $R_E$ $100 \Omega$ $C_2$ $10 \mu F$

(a) Determine the critical frequencies associated with the low-frequency response of the BJT amplifier in Figure below. Which is the dominant critical frequency? Sketch the Bode plot. (b) Determine the voltage gain of the amplifier in the Figure below at one-tenth of the dominant critical frequency, at the dominant critical frequency, and at ten times the dominant critical frequency for the low-frequency. (c) Determine the phase shift at each of the frequencies used in part (b). (d) Determine the critical frequencies associated with the high-frequency response of the amplifier in the Figure below. Identify the dominant critical frequency and sketch the Bode plot. (e) Determine the voltage gain of the amplifier in the Figure below at the following frequencies: 0.1fc, fc, 10fc, and 100fc, where fc is the dominant critical frequency in the high-frequency response. (f) Determine the bandwidth of the amplifier in the Figure below.

Adi S.

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