106年 - 106 國立嘉義大學_碩士班招生考試試題_電機工程學系：電子學#146469

1. Determine v_o in the op amp circuit shown in Fig. 1. (15 %)

Fig. 1

2. Find v_o and i_o in the op amp circuit shown in Fig. 2. (20%, each question takes 10%)

Fig. 2

(a) \( V_B \), \( V_E \), and \( V_C \). (Each sub-question takes 5%) If \( R_B \) is raised to 270 k\( \Omega \), find

(b) \( V_B \), \( V_E \), and \( V_C \). (Each sub-question takes 5%)

(a) V_t = 1 V and k'_n(W/L) = 0.5 mA/V², find the voltages “V_S” and “V_DS”. (Each sub-question takes 5%)

(b) V_t = 2 V and k'_n(W/L) = 1.25 mA/V², find the voltages “V_S” and “V_DS”. (Each sub-question takes 5%)

5. In Fig. 5, let the two transistors Q₁ and Q₂ both have v_BE = 0.7 V at 1 mA current, and assume β to be high. Utilizing a reference current IREF of 100 μA.
Design the emitter resistance “R_E” to provide an output current I_o of 10 μA. (15%)