A BiCMOS amplifier is shown in Fig 3 78 Calculate the small signal voltage gain v o v i Assume I S 10 16 A, Icirc sup2 F 100, r b 0, V A , Icirc frac14 n C ox 200 micro A V 2 , V t 0 6 V, and Icirc raquo 0 Check your answer with SPICE and then use SPICE to investigate the effects of velocity satura...

V CC I D2 10 K V BE2 V GS2 5 I D2 10 K 07 V GS2 5 20 V GS2 06 2 07 V GS2 0 20 V 2 GS2 23 V ...

A BiCMOS amplifier is shown in Fig. 3.78. Calculate the small-signal voltage gain v o / v

Question:

A BiCMOS amplifier is shown in Fig. 3.78. Calculate the small-signal voltage gain v_o/ v_i. Assume I_S= 10^ˆ’16A, Î²_F= 100, r_b= 0, V_A†’ ˆž, Î¼_nC_ox= 200 µA / V², V_t= 0.6 V, and Î»= 0. Check your answer with SPICE and then use SPICE to investigate the effects of velocity saturation by including source degeneration in the MOS transistors as shown in Fig. 1.41 using Îµ_c= 1.5 Ã— 10⁶V/m

Fig. 3.78:

5 V 10 k2 10 kN R12 Оз 1 k2 R11 Q1 Q2 M1 300 1 kΩ R13 Vo M2 20 Vi 30 k2