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Unformatted text preview: m . c) Replace the transistor with the hybrid- model, shown in lecture 5 page 30, 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) C B Fig.2 3- For the emitter follower in Fig. 3, the signal source is directly coupled to the transistor base. a) If the dc component of v sig is zero, find the dc emitter current. Assume = 100 (consider V BE 0.7V for the dc analysis) . b) Find the input resistance R in . c) Find the voltage gain A v =v o /v sig . Fig.3 Due date: Nov. 14, 2007. Late submission will not be accepted....
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- Spring '09