*7.109 Consider the two-supply bias arrangement shown in Fig. 7.53 using ±5-V supplies. It is required to design the circuit so that I C = 0.5 mA and VC is placed 2 V above V E. (a) For β =∞, what values of RE and RC are required? (b) If the BJT is specified to have a minimum β of 50, find the largest value for RB consistent with the need to limit the voltage drop across it to one-tenth the voltage drop across R E. (c) What standard 5% resistor values (see Appendix J) would you use for RB, RE, and RC? In making your selection, use somewhat lower values in order to compensate for the low-β effects. (d) For the values you selected in (c), find IC, VB, VE, and VC for β =∞ and for β =50.

109 1 - *7.109 Consider the two-supply bias arrangement shown in Fig. 7.53 using ±5-V supplies. It is required to design the circuit so that I C = 0.5 mA and VC is placed 2 V above V E. (a) For β =∞, what values of RE and RC are required? (b) If the BJT is specified to have a minimum β of 50, find the largest value for RB consistent with the need to limit the voltage drop across it to one-tenth the voltage drop across R E. (c) What standard 5% resistor values (see Appendix J) would you use for RB, RE, and RC? In making your selection, use somewhat lower values in order to compensate for the low-β effects. (d) For the values you selected in (c), find IC, VB, VE, and VC for β =∞ and for β =50.

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images - *7.109 Consider the two-supply bias arrangement shown in Fig. 7.53 using ±5-V supplies. It is required to design the circuit so that I C = 0.5 mA and VC is placed 2 V above V E. (a) For β =∞, what values of RE and RC are required? (b) If the BJT is specified to have a minimum β of 50, find the largest value for RB consistent with the need to limit the voltage drop across it to one-tenth the voltage drop across R E. (c) What standard 5% resistor values (see Appendix J) would you use for RB, RE, and RC? In making your selection, use somewhat lower values in order to compensate for the low-β effects. (d) For the values you selected in (c), find IC, VB, VE, and VC for β =∞ and for β =50.

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