*7.112 (a) Using a 3-V power supply, design the feedback bias circuit of Fig. 7.54 to provide IC = 1 mA and VC = V CC/2 for β =100. (b) Select standard 5% resistor values, and reevaluate VC and IC for β =100. (c) Find VC and IC for β =∞. (d) To improve the situation that obtains when high-β transistors are used, we have to arrange for an additional current to flow through RB. This can be achieved by connecting a resistor between base and emitter, as shown in Fig. P7.112.

112 - *7.112 (a) Using a 3-V power supply, design the feedback bias circuit of Fig. 7.54 to provide IC = 1 mA and VC = V CC/2 for β =100. (b) Select standard 5% resistor values, and reevaluate VC and IC for β =100. (c) Find VC and IC for β =∞. (d) To improve the situation that obtains when high-β transistors are used, we have to arrange for an additional current to flow through RB. This can be achieved by connecting a resistor between base and emitter, as shown in Fig. P7.112.

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images - *7.112 (a) Using a 3-V power supply, design the feedback bias circuit of Fig. 7.54 to provide IC = 1 mA and VC = V CC/2 for β =100. (b) Select standard 5% resistor values, and reevaluate VC and IC for β =100. (c) Find VC and IC for β =∞. (d) To improve the situation that obtains when high-β transistors are used, we have to arrange for an additional current to flow through RB. This can be achieved by connecting a resistor between base and emitter, as shown in Fig. P7.112.

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