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Unformatted text preview: the equation for the emitter voltage v e as a function of v tb , i b , and any appropriate resistors. (b) If i is neglected and i c = g m v π = βi b = αi e , solve the equation obtained above for v e as a function of v tb , i e , and any appropriate resistors. (c) Use the equation obtained above to obtain and draw the Thévenin equivalent circuit seen looking into the emitter. v e = v tb − i b ( R tb + r π ) = v tb − i e 1 + β ( R tb + r π ) = v tb − ( i e − i ) R tb + r π 1 + β ' v tb − i e R tb + r π 1 + β The circuit is a voltage source v tb in series with a resistor ( R tb + r π ) / (1 + β ) . 2...
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 Spring '08
 HOLLIS
 Personal name, Given name, Analog Circuits, June 2, Vbb, RC IC IC

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