Suppose that the peak-peak output swing requirement in Problem 6.22 is reduced while the other conditions are held constant. This change allows the overdrive magnitude to be increased. Which transistor in the bias circuit of Fig. 6.30d enters the triode region first if the overdrive magnitudes are increased uniformly? Explain. Exclude M₁₀₆ and M₁₁₄from consideration because they are deliberately operated in the triode region. How can the bias circuit be designed to increase the allowed overdrive magnitude while operating all transistors except M₁₀₆ and M₁₁₄ in the active region? What are the disadvantages of the modified bias circuit?

Figure 6.30d

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VDD M111 M107 M106 - VBIAS2 VBIAS1- M105 IBIAS M112 M108 M113 M109 M104 M101, VвBAS3 УВASA M114 M110 M103 M102, -Vss