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This is the MOSFET question , please explain step by step. Thanks so much



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螢幕截圖 2019-12-12 上午11.16.16.png

螢幕截圖 2019-12-12 上午11.16.16.png

Problem 2.
a) Using small signal model of transistor including output resistance and body effect,
calculate voltage gain (Vo/Vin) for three amplifiers shown in Fig.2. Assume the following
small signal parameters for both NMOS and PMOS devices: gm = 1 mS, r. = 20 kQ and gmb
= 0.2 gm. [2 pt.]
b) Assuming the dc voltage of node Vx is half of supply voltage (Vad=5 V) and transistors need 0.1V
headroom to operate in active region, plot output waveform when Vin = 2.5+0.2 Sin(wt) applied
to the input. [3 pt.]
Vad
Vad
Vad
Vb
Vx
IHO V.
VX
V.
VX
V.
Vad
Vin
Vin
Vin
(i)
(ii)
(ifi)
Fig. 2

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