課程名稱︰電子學(三)
課程性質︰臺灣師範大學校際課程
課程教師︰林群佑
開課學院：科技學院
開課系所︰電機工程學系
考試日期（年月日）︰2020/4/23
考試時限（分鐘）：9:10-13:10 (240分鐘)
試題 :
1. (25%) In the following amplifer, assuming Q1, Q2, Q3, Q4, Q6 and Q7 have
gm = 10 mA/V and ro = 10kΩ and Rc = 100kΩ.
(a) Find the low-frequency small-signal gain (Vo/Vid)
(b) Assuming all the parasitic capacitances are negelectable as com-
paring with Cc, design the value of Cc to make the dominant pole
of this amplifier be at 200 Hz (i.e. wp = 1.26 × 10^3 rad/s).
Fig.1 https://imgur.com/aRLdL6s
2. (25%) (a) Find the transfer function Vo/Vi, in terms of s, R and C of the
following filter.
(b) Using R = 1kΩ and C = 1nF, find the center frequency and 3dB
bandwidth.
Fig.2 https://imgur.com/PnerF6e
3. (25%) (a) Find the first-stage transfer function Vx / Vi in terms of s, R
and C.
(b) Find the second-stage transfer function Vo / Vx in terms of s, R
and C.
(c) Using R = 1kΩ and C = 1nF, find the center frequency and 3dB
bandwidth.
Fig.3 https://imgur.com/yPTLclB
4. (25%) (a) Find the transfer function Vo / Vi in terms of s, R and C of the
following filter.
(b) Using R = 1kΩ and C = 1nF, find the center frequency and 3dB
bandwidth
Fig.4 https://imgur.com/FRNf6oD