Answer: Resistor networks are sometimes used as volumecontrol circuits. In this

Chapter 3, Problem 3.64

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Resistor networks are sometimes used as volumecontrol circuits. In this application, they are referred to as resistance attenuators or pads. A typical fixed-attenuator pad is shown in Fig. P3.64. In designing an attenuation pad, the circuit designer will select the values of R] and R2 so that the ratio of v0 /v-, and the resistance seen by the input voltage source i?ab both have a specified value. a) Show that if /?ab = RL, then R 2 L = 4RX(R1 + R2), Ri Vj 2R{ + R2 + RL b) Select the values of R that l and R2 so ^ab = ^ L = 600 a and vajvi = 0.6. c) Choose values from Appendix H that are closest to i?! and R2 from part (b). Calculate the percent error in the resulting values for R,db and VQ/V] if these new resistor values are used.