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Step of 4 13.039P Refer to Figure 12.15 in the text book. Q, I I I I Q, Q. 21 ß, I I (1) Figure 1 Step 2 of 4 Refer to equation 7.68 in the text book. Write the relationship between and. Substitute Apply Kirchhoff's current law at node (1) as shown in Figure 1. = = Since, Determine the current I I 4 = 4 =4.75 Thus, the value of I is Step of 4 The value of I is, =9.5 = Determine the current =4x9.5 = 38 Determine the current 15-0.7-0.7-(-15) = = 0.73 mA Thus, the reference current of the Wildar current source is 0.73 mA Step of 4 Refer to equation 12.75 in the text book. Determine the series emitter resistance of the Wildar source. = = Thus, the series emitter resistance of the Wildar source is