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Asked: 2023-07-22T13:30:32-04:00 In:

D 13.45 Design a Widlar current reference to generate the bias currents I1 and I2 of the op amp in Fig. 13.15. Use the circuit of Fig. 13.14 (excluding transistors Q5 and Q6) with I = 15 µA, I7 = 45 µA, and I8 = 150 µA. Assume IS1,3,4 = 10−15 µA and IS2 = 4 × 10−15. Specify the areas of Q7 and Q8 in terms of the area of Q3 and all resistor values. Design for a voltage drop of 0.1 V across R3 and R4. A7 = 3A3; A8 = 10A3; R3 = R4 = 6.67 kΩ; R7 = 2.22 kΩ; R8 = 667Ω

Venkyelectrical
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D 13.45 Design a Widlar current reference to generate the bias currents I1 and I2 of the op amp in Fig. 13.15. Use the circuit of Fig. 13.14 (excluding transistors Q5 and Q6) with I = 15 µA, I7 = 45 µA, and I8 = 150 µA. Assume IS1,3,4 = 10−15 µA and IS2 = 4 × 10−15. Specify the areas of Q7 and Q8 in terms of the area of Q3 and all resistor values. Design for a voltage drop of 0.1 V across R3 and R4.

A7 = 3A3; A8 = 10A3; R3 = R4 = 6.67 kΩ; R7 = 2.22 kΩ; R8 = 667Ω

microelectronics by sedra & smith chapter 13 questions

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