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6.(20) BJT small signal model, cutoff frequency a) Suppose the PNP BJT of Figure (shown below, left) is biased in active mode at a = 10μA and VEC 10V. The forward transit time - 100ps. Determine the values of ra, Cr and gm to be used in the "hybrid-pi" small signal model (shown below, right). You may assume that the dominant component of Cr is the base-emitter-junction diffusion capacitance. Ic(mA) 2 1 40 /a-10μA Iepe VEC (volt) -7.5µA Jy-SUA 60 lg-2.5A 100 2

6.(20) BJT small signal model, cutoff frequency a) Suppose the PNP BJT of Figure (shown below, left) is biased in active mode at a = 10μA and VEC 10V. The forward transit time - 100ps. Determine the values of ra, Cr and gm to be used in the "hybrid-pi" small signal model (shown below, right). You may assume that the dominant component of Cr is the base-emitter-junction diffusion capacitance. Ic(mA) 2 1 40 /a-10μA Iepe VEC (volt) -7.5µA Jy-SUA 60 lg-2.5A 100 2

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
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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Electrical Engineering 6.(20) BJT small signal model, cutoff frequency a) Suppose the PNP BJT of Figure (shown below, left) is biased in active mode at /B = 10μA and VEC = 10V. The forward transit time n = 100ps. Determine the values of r, Cr and gm to be used in the "hybrid-pi" small signal model (shown below, right). You may assume that the dominant component of Cr is the base-emitter-junction diffusion capacitance. afife an &m be (ve) ly 20 10μA -7.5µA lejo VEC (volt) 40 J-SUA I-2.5A ano 60 80 A 100 2 E
Transcribed Image Text:Electrical Engineering 6.(20) BJT small signal model, cutoff frequency a) Suppose the PNP BJT of Figure (shown below, left) is biased in active mode at /B = 10μA and VEC = 10V. The forward transit time n = 100ps. Determine the values of r, Cr and gm to be used in the "hybrid-pi" small signal model (shown below, right). You may assume that the dominant component of Cr is the base-emitter-junction diffusion capacitance. afife an &m be (ve) ly 20 10μA -7.5µA lejo VEC (volt) 40 J-SUA I-2.5A ano 60 80 A 100 2 E
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