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Question 6.9: Determine the transfer function of the complementary CS stag...

Determine the transfer function of the complementary CS stage shown in Fig. 6.20(a).

6.20
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Since the corresponding terminals of M_1  and  M_2 are shorted to one another in the small-signal model, we merge the two transistors, drawing the equivalent circuit as shown in Fig. 6.20(b). The circuit thus has the same transfer function as the simple CS stage studied above.

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