申論題

3. Consider the amplifier circuit shown in Fig. 3. The BJT has = 0.7 V, β = 200, C_μ = 0.8 pF, and f_r= 600 MHz. The MOSFET has V_t= 1 V, k'WIL =2 mA/V², and =1 pF.

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