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An ac equivalent circuit of a Darlington pair configuration is shown in Fig- ure P6.79. The transistor parameters are B, = 120, B, = 80, V = 80 V, and Va2 = 50 V. Determine the output resistance R. for (a) Ic2 = /nias = I mA: (b) lc2 = 1 Inias - 0. I mA. Inias = 0.2 mA; and (c) /c2 = 2 mA.

An ac equivalent circuit of a Darlington pair configuration is shown in Fig- ure P6.79. The transistor parameters are B, = 120, B, = 80, V = 80 V, and Va2 = 50 V. Determine the output resistance R. for (a) Ic2 = /nias = I mA: (b) lc2 = 1 Inias - 0. I mA. Inias = 0.2 mA; and (c) /c2 = 2 mA.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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I have solved it for part a only is the answer true for R-out
An ac equivalent circuit of a Darlington pair configuration is shown in Fig- ure P6.79. The transistor parameters are B, = 120, B = 80, V = 80 V. and V42 = 50 V. Determine the output resistance R. Ic: = IBias = I mA: (b) lcz = I mA. IBias = 0.2 mA; and (c) Ic = 2 mA. IBiss = 0. Q. 3 for (a) -R. a AC ground Figure P6.79 是) 120 121 80 Imı: 38.62 m AN , rm,:3-1o8 Kn,Yo,: 79-68 Kr 9m2 - 3 8. 46 mn AV rilz=2.08 Kn , ľo̟ : 50KA Vg - VT .KUL Yo, 2) Vn, +VM,:0 -) Va, : -Vn, • KCI at h Then 3 Vn2 - -V r, + 12 a folluw be hamal page it vq (o.00031825 G°79.68 -38 62) - Vg(0.32495) 79-68 %3D - 30 77Kn
Transcribed Image Text:An ac equivalent circuit of a Darlington pair configuration is shown in Fig- ure P6.79. The transistor parameters are B, = 120, B = 80, V = 80 V. and V42 = 50 V. Determine the output resistance R. Ic: = IBias = I mA: (b) lcz = I mA. IBias = 0.2 mA; and (c) Ic = 2 mA. IBiss = 0. Q. 3 for (a) -R. a AC ground Figure P6.79 是) 120 121 80 Imı: 38.62 m AN , rm,:3-1o8 Kn,Yo,: 79-68 Kr 9m2 - 3 8. 46 mn AV rilz=2.08 Kn , ľo̟ : 50KA Vg - VT .KUL Yo, 2) Vn, +VM,:0 -) Va, : -Vn, • KCI at h Then 3 Vn2 - -V r, + 12 a folluw be hamal page it vq (o.00031825 G°79.68 -38 62) - Vg(0.32495) 79-68 %3D - 30 77Kn
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