申論題

1.(20%) Figure 1 shows a MOSFET circuit with the =200 kΩ, R_D = 2 kΩ, R_s = 1 kΩ, R_L = 1 kΩ. The threshold voltage WIL of MOSFET are -1 V and 2 mA/V² respectively. Neglect the channel length modulation effect. (a) Please find the DC drain current I_D. (b) For AC analysis, please find the input resistance , output resistance and overall gain (5%*4)