110年 - 110 國立臺灣大學_碩士班招生考試_生醫電子與資訊學研究所甲組:應用電子學(含電路學、二極體、電晶體及基本電路、放大器)#101254

(a) Please derive the transfer function (7%).

(b) Please sketch a Bode plot for the magnitude response (10%).

2. Assuming that the diodes in the circuits of Fig. 2 are ideal, please find the values of the labeled currents and voltages (8%).

(a) Please determine the amplifier input resistance, and the overall voltage gain. Assume r_o of both transistors to be very large (12%).

(b) Consider the circuit at low frequencies. Please find the frequency of the poles due to C₁ and C₂, and hence estimate the lower 3-dB frequency, f_L (10%).

(c) Consider the circuit at higher frequencies. Please use open-circuit time constants to estimate f_H (8%).

4. For the current-mirror-loaded differential amplifier in Fig. 4. Assume β = 100, = 0.7 V, IV_AI = 60 V, V_t = 0.7 V, and k(WI) = 2 mA/V². Please find:
(a) differential input resistance (5%), (b) A_d (5%), and (c) CMRR (5%).

(a) Please determine V_c and i_c during charge (4%).

(b) Through the charging process, are the capacitors in steady state? Please explain it 4(%).

(c) Please find the magnitude of the charge and energy stored on the 10- and 40-uF capacitors at t - 8 ms, respectively (4%). After 8 ms, the switch is opened.

(d) Please find V_c and i_c during discharge (4%).

(e) Please estimate how long will the transient last. (4%)

6. In Fig. 6, please find Z_L for maximum average power transfer and please compute the maximum average power supplied to the load. (10%)

110年 - 110 國立臺灣大學_碩士班招生考試_生醫電子與資訊學研究所甲組:應用電子學(含電路學、二極體、電晶體及基本電路、放大器)#101254

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