1. (10%) Derive the current I_1 for the circuit in Fig. 1?

7. (10%) For the circuit in Fig. 7, \( V{\text{in}} \) and \( V{\text{out}} \) are input and output voltages, respectively, \( V{\text{b1}} \) is a dc bias voltage. (a) Is \( M1 \) a current course, common-source, common-drain, or common-gate amplifier? (b) Is \( M_2 \) a current source, common-source, common-drain, or common-gate amplifier? (You must explain.)

1. (10%) Derive the current \( I_{1} \) for the circuit in Fig. 1?

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