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QUESTION 2 [7 MARKS] Consider the JFET circuit in Figure 2, with Vpp = 12 V, IDss = 5 mA and Vascoff) = -4 V (for both JFETs). The input voltage VA and Vg will continuously (and erratically) vary between 0 V and 2 V. You are tasked to select the value of RD, RA, and Rg such that: The output voltage Vout is always between 5V and 10V. The JFET is operated at the active region, i.e. Vps > -VGscoff). . Voo Ro VOUT VA Rk Figure 2: JFET circuit Please select the resistor values from the standardised list shown in Appendix A. With the selected resistor values, please answer the following questions. A. Compute 1A and Ig at both extreme scenarios. [5 marks] B. Compute Vour at both extreme scenarios. [2 marks]
APPENDIX A RESISTOR VALUES Table 2: Standardised resistor values. Ω 10 100 11110 12 120 13 130 15 150 16 160 18 180 ΚΩ 10 11 12 13 15 16 18 100 110 120 130 150 160 180 200 220 240 290 270 300 330 360 390 430 470 - 27 30 1.0 1.1 1.2 1.3 1.5 1.6 1.8 2.0 22 2.4 2.7 3.0 3.3 3.6 3.9 4.3 12 47 5.1 5.6 6.2 6.8 7.5 8.2 9.1 300 51 680 750 code 820 910 91