Repeat Problem 4 29 assuming that the values of I S , R 2 , and R 1 are nominal but that R 3 is 1 percent low Assume V BE(on) 0 6 V Data from Prob 4 29 A band gap reference like that of Fig 4 47 is designed to have nominally zero TC F at 25 deg C Due to process variations, the saturation current I S of the transistors is actually twice the nominal value Assume V OS 0 What is dV OUT dT at 25 deg C Neglect base currents Fig 4 47 Vos R2 R3 VOUT Q2

Question: Repeat Problem 4.29 assuming that the values of I S , R 2 , and R 1 are nominal but that R 3 is 1

Repeat Problem 4.29 assuming that the values of I_S, R₂, and R₁are nominal but that R₃is 1 percent low. Assume V_BE(on)= 0.6 V.

Data from Prob. 4.29:

A band-gap reference like that of Fig. 4.47 is designed to have nominally zero TC_F at 25°C. Due to process variations, the saturation current I_S of the transistors is actually twice the nominal value. Assume V_OS = 0. What is dV_OUT/dT at 25 °C? Neglect base currents.

Fig. 4.47:

Vos R2 :R3 VOUT Q2

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With V OS 0 From 4266 V OUT V EB2 V R3 V R2 From 4264 V R3 V EB1 V EB2 Therefore V OU... View full answer

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