A differential amplifier that does not use a tail current source is shown in Fig 12 55 (a) Compute the low frequency gains a dm and a cm For all transistors, drain currents are 100 micro A and V ov 0 2 V Also, V An 10 V, and V Ap 20 V (b) Compare these gains with the gains calculated in the first example in Section 12 4 1 Figure 12 55 VDD M4 Vo2 VBIAS Vo1 Vi2 M2 M1 Vi1 Vss

Question: A differential amplifier that does not use a tail current source is shown in Fig. 12.55. (a) Compute the low-frequency gains a dm and a

A differential amplifier that does not use a tail current source is shown in Fig. 12.55.

(a) Compute the low-frequency gains a_dm and a_cm. For all transistors, drain currents are 100 µA and |V_ov| = 0.2 V. Also, V_An = 10 V, and |V_Ap| = 20 V.

(b) Compare these gains with the gains calculated in the first example in Section 12.4.1.

Figure 12.55:

VDD M4 Мз Vo2 VBIAS Vo1 Vi2 M2 M1 Vi1 -Vss

VDD M4 Vo2 VBIAS Vo1 Vi2 M2 M1 Vi1 -Vss

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