Determine the input impedance and load voltage for the small signal model of amplifier in Fig. 7. Here gm = 1 mA/V, Vsig = 25 mV, VDD = 22 V, RG = 1.2 Mohm, RD = 1.6 kohm, Rs = 20 ohm, RL =12 kohm and ignore ro. Label small signal model properly.
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![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 = 1mS, ro = 20 kΩ and gmb = 0.2 gm. [2pt.] b) Assuming the dc voltage of node Vx is half of supply voltage (Vdd = 5 V) and transistors need 0.1 V headroom to operate in active region, plot output waveform when Vin = 2.5 + 0.2 Sin(ωt) applied to the input. [3 pt.] (i) (ii) (iii) Fig. 2](https://www.doubtrix.com/uploads/editor/0822912335FZPTUsgmHo.png)
