*6.49 Consider the circuit of Fig. P6.48 for the case V BB = V CC . If the BJT is saturated, use the equivalent circuit of Fig. 6.21 to derive an expression for β forced in terms of V CC and R B /R C . Also derive an expression for the total power dissipated in the circuit. For V CC = 5 V, design the circuit to obtain operation at a forced β as close to 10 as possible while limiting the power dissipation to no larger than 20 mW. Use 1% resistors (see Appendix J).

image 245 - *6.49 Consider the circuit of Fig. P6.48 for the case V BB = V CC . If the BJT is saturated, use the equivalent circuit of Fig. 6.21 to derive an expression for β forced in terms of V CC and R B /R C . Also derive an expression for the total power dissipated in the circuit. For V CC = 5 V, design the circuit to obtain operation at a forced β as close to 10 as possible while limiting the power dissipation to no larger than 20 mW. Use 1% resistors (see Appendix J).

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images - *6.49 Consider the circuit of Fig. P6.48 for the case V BB = V CC . If the BJT is saturated, use the equivalent circuit of Fig. 6.21 to derive an expression for β forced in terms of V CC and R B /R C . Also derive an expression for the total power dissipated in the circuit. For V CC = 5 V, design the circuit to obtain operation at a forced β as close to 10 as possible while limiting the power dissipation to no larger than 20 mW. Use 1% resistors (see Appendix J).

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