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-β 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; β₁ = β₂ = 5000; r_b1 = r_b2 = 500 Ω.

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

Fig. 11.53a:

Fig. 11.53b:

Transcribed Image Text:

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