102年 - 102 國立高雄大學_博士班招生考試試題_電機工程學系：電子學#147998

科目：研究所、轉學考(插大)◆電子學 | 年份：102年 | 選擇題數：0 | 申論題數：6

試卷資訊

所屬科目：研究所、轉學考(插大)◆電子學

選擇題 (0)

申論題 (6)

1. Explain the mode of operation for MOSFET, and (b) describe small –signalequivalent circuit models of the operating in saturation mode. (20%)
2. For the circuit in Fig. 1, V DD=10V, VT=2V, k(W/L)=1mA/V2, VGS=4V, andRD=3.5kΩ.
(a) If R G=0, neglect channel length modulation, Find I D,VD, g m and A v(10%)
(b) If exist RG=10MΩ and VA=50V, please find Av and Rin. (10%)
3. Please describe the advantage of feedback, and its topologies. (20%)
4. A second-order filter has its poles at s = -(1/4) ± j( √3/4). The transmissionis zero at ω = 2 rad/s and is unity at dc ( ω= 0). Please find the transferfunction. (20%)
5. Please design a MOSFET current mirror to provide currents of Io andIo/simultaneously where Io is a constant. (20%)