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ཥɿኪўྼ୦ɨ
7-2 立即練習
2
1. νྡ (1) הͪʘ׳ɽཥ༩dʊٝ E-MOSFET ʘ K = 2mA/V eV = –2Vdӝ
T
ཥڜਞᅰ r = ∞dۆ v / v ߒމОkc(A) –8c(B) –12c(C) –24c(D) –32f
o
i
d
－12V
+V DD
3kΩ
v o
R D
v i D
6kΩ G v o
1MΩ v i
S
3V 1MΩ
－
＋ 1kΩ
ྡ (1) ྡ (2)
2. νྡ (2) הͪʘ׳ɽኜཥ༩dV = 12VdMOSFET ʘ࿚˟ཥᏀ V GS(off) = –2Vd
DD
I DSS = 3mAdӝ๕ʹݴഃࣖཥڜ r = ∞dӝٜݴᏀཥݴ I = 0.9mAi߰
D
d
፩ɝʃৃ v މࢤ࿁ࢤ࠽ 50mV ʘָتࣛdඎ v ʘࢤ࿁ࢤ࠽މ 300mVd
o
i
ۆ R ࠽ߒމОkc(A) 1.74 kΩc(B) 2.53 kΩc(C) 3.64 kΩc(D) 4.72 kΩf
D
3. ߰ྡ (3) ʕd(a) ၾ (b) ʘఙࣖཥ౺Ъίཱིձਜd˲ཥ౺ʘ g މ 2mSd
m
R = 6kΩdR = 1MΩdR = 1.5kΩdۆՇཥ༩ʘཥᏀ׳ɽଟࢨ࠴k
D
G
S
(A) 1c(B) 2c(C) 4c(D) 8f
V DD V DD
R D R
V o D
V i C i C o V C i C V o
Q 1 i o
Q 1
R G R
R S C S G R S
(a) (b)
ྡ (3)
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