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Electronics Assignment 6

# Electronics Assignment 6 - amplitude Find the expressions...

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1 ECED3201: Introduction to Electronics Fall 2008 Dalhousie University, Department of Electrical and computer Engineering Assignments #6 1- In the circuit shown in Fig. 1, the transistor has V EB =0.7V and =30. a) Find the values of V B , V E , and V C . b) If R B is raised to 270 k , what voltages result? c) With R B = 270k , what value of would return the voltages of the values first calculated? Fig. 1 In all the following problems neglect r o (r o = ). 2- We wish to analyze the amplifier shown in Fig. 2. Assume =100, V BE 0.7V for the dc analysis. a) Find the voltage gain A v =v o /v i b) Consider v i (t) a sinusoidal signal with 10kHz frequency and 500 mV of

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Unformatted text preview: amplitude. Find the expressions for the total instantaneous quantities v C (t), v B (t), i C (t), and i B (t). 2 Fig.2 3-The transistor amplifier shown in Fig. 3 is biased with a constant current source I and has a very high . a) Find the dc voltage at the collector V c . b) Find the value of g m . c) Replace the transistor with the hybrid- model and find the voltage gain A v =v c /v i . (note that the dc current source I should be replaced with an open circuit for ac analysis) Fig.3 Due date: October 28, 2008. Late submission will not be accepted. C B...
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Electronics Assignment 6 - amplitude Find the expressions...

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