所屬科目：【阿摩】未分類題庫
1. (10%) Calculate the equivalent resistance \( R_{ab} \) in Fig. 1.
2. (15%) Find the Thevenin equivalent circuit of the circuit \( (V{TH}, R{TH}) \) as shown in Fig. 2.?
3. (10%) Compute the closed-loop gain \( (A{V} = V{out} / V{in}) \) of the amplifier shown in Fig. 3, assuming \( A0 = 100 \), \( R{1} = 1\mathrm{k}\Omega \), and \( R{2} = 100\mathrm{k}\Omega \).
4. (15%) Apply Miller's Theorem to \( C{gd} \) in Fig. 4. (a) Redraw the high-frequency model of a CS amplifier and (b) derive its 3-dB high-frequency of \( f{fl} \).
5. (15%) Fig. 5 shows that the common-source stage provides a voltage gain of 10 with a bias current of \( 0.5\mathrm{mA} \). Assume \( \lambda{1} = \lambda{2} = 0.1\mathrm{V}^{-1} \), \( V{\mathrm{in}} = |V{\mathrm{ip}}| = 0.4\mathrm{V} \), and \( \mu{\mathrm{e}}C{ox,n} = 2\mu{\mathrm{p}}C{ox,p} = 200\mu \mathrm{A} / \mathrm{V}^2 \) (a) Compute the required value of \( (W / L)1 \). (b) If \( (W / L)2 = 10 \), calculate required dc bias of \( V_{b} \).
6. (10%) (a) Derive the transfer function \( V{out}(s) / V{in}(s) \) and (b) find its type of response of Fig. 6. (low-pass, high-pass, or band-pass Filter)
7. (10%) Plot the \( V{in} / V{out} \) characteristic of the circuit with an ideal diode, as shown in Fig. 7. (Hint: input \( V{in} \) as \( x \)-axis and output \( V{out} \) as \( y \)-axis)
8. (15%) Draw the Bode plot gain and phase response of \( \mathrm{A(s)} = [500(\mathrm{s} + 2)] / [2\mathrm{s}(\mathrm{s} + 50)] \).
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