(10%) Assuming that all the transistors in the circuits of Fig. 4 are

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(10%) Assuming that all the transistors in the circuits of Fig. 4 are saturated. Use λ = γ = 0 for bias purpose and γ = 0, λ ≠ 0 for small signal analysis. Calculate the small-signal differential voltage gain ADM = (Vout1 − Vout2 )/(Vin1 − Vin2 ) of each circuit. (R1 = R2) Derive the expression for ADM in terms of device parameters such as Rx, gmx, and rox. (a) (b) Figure 4

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$(10 %)$ Assuming that all the transistors in the circuits of Fig. 4 are saturated. Use $λ = γ = 0$ for bias purpose and $γ = 0, λ \neq 0$ for small signal analysis. Calculate the small-signal differential voltage gain $A_{D M} = (V_{out1} - V_{out2}) / (V_{in1} - V_{in2})$ of each circuit. $(R_{1} = R_{2})$ Derive the expression for $A_{DM}$ in terms of device parameters such as $R_{x}, g_{x}$ , and $r_{o x}$ . (a) (b) Figure 4