3-1 Two types of common source amplifier are shown in Fig.3.1. Assume that the biasing currents in each circuit are equal, the capacitors of the output node in each circuit are equal, all transistor work in strong-inversion mode. (a) (b) Figure 3.1 (a) If the W/L of M1 in circuit (a) and (b) of Fig.3.1 increases, how dose Vout(min) change (decreases, increases, remains constant or be uncertain)? (b) If the biasing current of circuit (a) and (b) of Fig.3.1 increases, how dose Vout/Vin,GBW and PM change (decreases, increases, remains constant or be uncertain)? 3-1 Two types of common source amplifier are shown in Fig.3.1. Assume that the biasing currents in each circuit are equal, the capacitors of the output node in each circuit are equal, all transistor work in strong-inversion mode. (a) (b) Figure 3.1 (a) If the W/L of M1 in circuit (a) and (b) of Fig.3.1 increases, how dose Vout(min) change (decreases, increases, remains constant or be uncertain)? (b) If the biasing current of circuit (a) and (b) of Fig.3.1 increases, how dose Vout/Vin,GBW and PM change (decreases, increases, remains constant or be uncertain)