assign 5 - Q 1 in active region b For R C = 500 W calculate...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
1 ECED3201: Introduction to Electronics Fall 2008 Dalhousie University, Department of Electrical and computer Engineering Assignments #5 1- Determined the voltages at the nodes B 1 , C 1 , E 1 , B 2 , C 2 , E 2 and the currents I E1 , I B1 , I C1 , I E2 , I B2 , and I C2 . Assume V BE1 = V BE2 = 0.7V and 1 = 2 =100. (Consider the npn BJT in active region if V BC < V BCon = 0.4V) +6V R C2 = 1k W Q 1 R E2 = 2.5k W +6V R E1 = 1k W R C1 = 1.2k W +6V R B1 = 3k W R B2 = 3k W Q 2 B 1 C 1 E 1 E 2 B 2 C 2 I B1 I E1 I C1 I B2 I E2 I C2 Fig. 1 2- Consider the circuit shown in Fig. 2. I S = 6.95×10 -16 A and = 100 for the npn BJT ( Q 1 ), V T =25mV and V CC = 5V . (Consider the npn BJT in active region if V BC < V BCon = 0.4V) R C Q 1 V BE V CC Fig.2
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
2 a) For V BE = 0.7V, determine the maximum value of R C that permits the operation of
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Q 1 in active region. b) For R C = 500 W , calculate the maximum value of V BE that permits the operation of Q 1 in active region . c) Consider now V BE = 0.7V and R C = 1k W . A small-signal v be is applied in series with V BE as shown in Fig. 3. Draw the small-signal equivalent circuit and find the small-signal voltage gain v o / v be . For v be = 0.004sin 1 t-0.001sin 2 t (V), calculate the expressions for the total instantaneous quantities v O (t), i C (t) and i B (t). R C Q 1 V BE V CC v O +-v be i C i B Fig. 3 Due date: October 21, 2008. Late submission will not be accepted....
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern