Question: The MOSFETs in the schematic below have (1/2)kn' (W/L) = 50 mA/V, Vt = 1V, Cgs = 15 pF, and Cgd = 12pF. (a)

The MOSFETs in the schematic below have (1/2)kn' (W/L) = 50 mA/V, Vt = 1V, Cgs = 15 pF, and Cgd = 12pF. (a)

The MOSFETs in the schematic below have (1/2)kn' (W/L) = 50 mA/V, Vt = 1V, Cgs = 15 pF, and Cgd = 12pF. (a) Suppose R2 was such that the current in Q3 is 1 mA. Find R1 to make the passband differential gain 20, then estimate the upper 3 dB point for the amplifier. (b) Suppose R2 was such that the current in Q3 is 10 mA. Find R1 to make the passband differential gain 20, then estimate the upper 3 dB point for the amplifier. (c) Suppose R2 was such that the current in Q3 is 1 mA. Find R1 to make the passband differential gain 2, then estimate the upper 3 dB point for the amplifier. V+ R1 m R1 Q1 Q2 Q3 Vout R2 Q4

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