所屬科目：研究所、轉學考(插大)◆電子學
1.計算題(10分) Figure P1 shows the BJT amplifier with a current gain βof BJT is 100, thermal voltage VT = 25 mV and collector current. Assume that when is 0.7 V, lc is 1 mA. When Vc is -5 V, design RE and Rcto make Ic equal to 4 mA. Note the answer must be rounded to two decimal places. (RE與Rc各5 分)
2.計算題(10分) Figure P2 shows a BJT amplifier with infinite current gain β. Assume the threshold voltage VD of ideal diode is 0.7 V and ignore the base current of BJT. Find out the operation region of transistor Q1 and Q2 (active or saturation region).(全對10分,部分對3分,全錯0分·)
3.計算題(10分) Figure P3 shows a common-source amplifier which is biased at saturation region with threshold voltage = 1 V and channel-length modulation parameterλ = 0.0I . Find the small signal voltage gain -gmro.
4-1 (5 分) If differential gain Ad = ∞, find out Vo.
5-1 (5 分) the output resistance
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. Assume that when 
is 0.7 V, lc is 1 mA. When Vc is -5 V, design
RE and Rcto make Ic equal to 4 mA. Note the answer must be rounded to two decimal places. (RE與Rc各5
分)
= 1 V and channel-length modulation parameterλ = 0.0I 
. Find the small signal voltage gain -gmro.
