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- 6. (25%) Consider the voltage amplifier of Fig. 6 with a BJT device having B = 100 when it is biased in
the active region. The coupling capacitors C = C2 = C3 = 1 uF. The voltage supplies are 5 V and the
thermal voltage Vr - 25.9 mV. If the transistor is specified to have fr = 700 MHz and Cu = 1 pi. The
constant voltage drop 0.7 V approximation can be used for the turn-on of a p-n junction. In addition.
other resistances are also included in the Fig. 6. Please calculate (a)f.,ffs (let fi ＜fi＜f) values of the
low-frequcncy transfer function Y.. = AM(- -), (b) the upper 3-dB frequcncy fil
by using open-circuit time constants method if the ro and rx effect are neglected. (5%*3, 10%)
s+2째 s+2g,) )(3+2可
- 5. (25%) Consider the voltage amplifier of Fig. 5 with two BJT devices: Q1 and Q2, having B = 100
when they are biased in the active region. The coupling capacitors C can block DC component and pass
AC component. The voltage supplies are 10 V and the thermal voltage Vr = 25.9 mV. The constant
voltage drop 0.7 V approximation can be used for the turn-on of a p-n junction. In addition, other
resistances are also included in the Fig. 5. Please come out the following parameters: (a) DC base voltage
of Q1: VBI, (b) DC base voltage of Q2: Viz, (c) DC collector voltage of Q2: Vc2. (d) overall AC voltage
gain vo/Vsig. (5%, 5%, 5%, 10%)
HIOV 1IOV
200 k 10k22
J0 V
5knz
100k로 skn3
Fig. 5
- 4. (15%) Consider the yoltage amplifier of Fig. 4 with a MOSFET specified to have Vi - 1.5 V,
Coxtn(WIL) = 0.5 mArV?, and I = 0.02 V'l. The coupling capacitors C can block DC component and
pass AC component. Calculate (a) the small-signal voltage gain vo/Vsis (b) its input resistance Rin, and (O)
the largest allowable input signal. (5%*3)
- 165. 有關旅館房舖鋪設技能之敘述，下列何者正確？甲、床罩下襬不客垂墜地面，可以足
背高度測量（約離地10-15公分）離地最適距離乙、保潔墊為第一層鋪設之布巾，鋪設時正
面朝下丙、如以床單包覆毛毯，需背三條床單，二條包覆毛毯，另一條包覆床墊丁、步驟順
序為拉床、鋪設保潔墊、鋪設床單、鋪設羽絨背及被套、鋪設枕頭及枕頭套、鋪設床罩、成
品檢視戊、鋪設第一層床單，反面應朝上 (A)乙丙戊 (B)乙丙丁 (C)丙丁戊 (D)甲丙
丁
- 164. 有關鋪設毛毯型加床床鋪之作業順序，下列何者正確？甲、 Bed Sheet，正面朝上 乙、
Bed Sheet，正面朝下 丙、 Blanket 丁、 Bed Cover 戊、 Pillow Case (A) 甲→乙→
丙→丁→戊 (B) 乙→甲→丙→甲→丁 (C) 甲→乙→丙→甲→戊 (D) 乙→丙→甲→戊
→丁
- 163. 洗衣房內需要許多器具，才能應付全館上下的所有布巾，請問下列何者不是洗衣房的
機具設備？ (A)乾洗機 (B)蒸氣清潔機 (C)壓板機 (D)摺疊機
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