Repeat Problem 11 11 if the bipolar transistors are replaced by MOS transistors with I G 0 1 fA and g m 0 5 mA V Assume C gs 0 Data from Prob 11 11 A super Icirc sup2 input stage is shown in Fig 11 53a (a) Neglecting flicker noise and capacitive effects, calculate the equivalent input noise voltage and current generators Iuml 2 and i 2 for this stage Data I EE 1 micro A Icirc sup2 1 Icirc sup2 2 5000 r b1 r b2 500 Icirc copy (b) If the circuit is fed from source resistances R S 100 M Icirc copy as shown in Fig 11 53b, calculate the total equivalent input noise voltage at Iuml s in a bandwidth of 1 kHz Fig 11 53a Fig 11 53b 12 Q2 IE V Rs Q1 Q2 Rs IEE V

Question: Repeat Problem 11.11 if the bipolar transistors are replaced by MOS transistors with I G = 0.1 fA and g m = 0.5 mA/V. Assume

Repeat Problem 11.11 if the bipolar transistors are replaced by MOS transistors with I_G= 0.1 fA and g_m= 0.5 mA/V. Assume C_gs= 0.

Data from Prob. 11.11:

A super-Î² input stage is shown in Fig. 11.53a.

(a) Neglecting flicker noise and capacitive effects, calculate the equivalent input noise voltage and current generators Ï…₂ and i₂ for this stage. Data: I_EE = 1 µA; Î²₁ = Î²₂ = 5000; r_b1 = r_b2 = 500 Î©.

(b) If the circuit is fed from source resistances R_S = 100 MÎ© as shown in Fig. 11.53b, calculate the total equivalent input noise voltage at Ï…_s in a bandwidth of 1 kHz.

Fig. 11.53a:

12 Q2 IE -V

Fig. 11.53b:

Rs Q1 Q2 Rs IEE -V

12 Q2 IE -V Rs Q1 Q2 Rs IEE -V

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