(1) For the differential amplifier circuit below, all transistors are identical ( 0). a) Draw the single-sided differential-mode equivalent circuit, showing all details and labels. Explain how you obtained this equivalent circuit. V DD V DD Q3 Q4 Rp Rp b) Draw the single-sided common-mode equivalent circuit, showing all details and labels. Explain how you obtained this equivalent circuit. oVol Vo2 0- QI Q2 Find an expression for the differential- c) mode gain of the single-sided and the whole circuits. Explain all steps. d) Find an expression for the common- mode gain of the single-sided and the whole circuits. Explain all steps. Ss 6