*8.75 Figure P8.75 shows a folded-cascode CMOS amplifier utilizing a simple current source Q2, supplying a current 2I, and a cascoded current source (Q4, Q5) supplying a current I. Assume, for simplicity, that all transistors have equal parameters gm and ro. (a) Give approximate expressions for all the resistances indicated. (b) Find the amplifier output resistance Ro. (c) Show that the short-circuit transconductance Gm is approximately equal to gm1. Note that the short-circuit transconductance is determined by short-circuiting vo to ground andfinding the current thatflows through the short circuit, Gmvi

8.75 - *8.75 Figure P8.75 shows a folded-cascode CMOS amplifier utilizing a simple current source Q2, supplying a current 2I, and a cascoded current source (Q4, Q5) supplying a current I. Assume, for simplicity, that all transistors have equal parameters gm and ro. (a) Give approximate expressions for all the resistances indicated. (b) Find the amplifier output resistance Ro. (c) Show that the short-circuit transconductance Gm is approximately equal to gm1. Note that the short-circuit transconductance is determined by short-circuiting vo to ground andfinding the current thatflows through the short circuit, Gmvi

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images - *8.75 Figure P8.75 shows a folded-cascode CMOS amplifier utilizing a simple current source Q2, supplying a current 2I, and a cascoded current source (Q4, Q5) supplying a current I. Assume, for simplicity, that all transistors have equal parameters gm and ro. (a) Give approximate expressions for all the resistances indicated. (b) Find the amplifier output resistance Ro. (c) Show that the short-circuit transconductance Gm is approximately equal to gm1. Note that the short-circuit transconductance is determined by short-circuiting vo to ground andfinding the current thatflows through the short circuit, Gmvi

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