Unformatted text preview: control c cuits. In this application, they are refened to as resr.rtdrce atknu&tors or pads. A typr-cal fixed-attenuator pad is shown in Fig. P3.63. In designiDg an drlenuado0 pad. lbe circuil designer will select the values of R1 and R2 so that the iatio of r,/oi and the resistance seen by the input voltage souice R"6 both have a speciJied value. a) ShowthatifRab: RL, then R i : 4 R r ( R 1 + R ) , 3 n - R L 3R + RL' when R2 has the valuejust given. a) Design a fixed attenuator so tlat oi : 3oo when R L : 6 0 0 o b) Assume the voltage applied to the input of the pad desigtred in (a) is 180 V Which iesistor in the pad dissipates t}le most power? c) How much power is dissipated in the resistor in part (b)? d) Which rcsistor in the pad dissipates the least e) How much power is dissipated ill the resistor in part (d)? b) Select the values of R1 and R2 Rab - RL = 600 O and 0,/?,r : 0.6. so that...
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This note was uploaded on 07/05/2010 for the course EE 100 taught by Professor Boser during the Spring '07 term at Berkeley.
- Spring '07