ex5 - BJT AMPLIFIERS Sample Problems - Dr. Aydn I. Karlayan...

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BJT AMPLIFIERS Sample Problems - Dr. Aydın ˙ I. Kar¸ sılayan For each circuit below, find the small-signal transfer function v o ( s ) /v i ( s ) and sketch its magnitude bode plot. Assume β = 100 and V T = 25 mV. Also find V o ( t ) for v i ( t ) = 10 - 3 sin(2 π 1000 t ). Simulate the circuits using PSPICE to verify your results. Provide circuit schematics and all necessary plots with measurements. Use Q2N3904 and Q2N3906 transistors for simulation. (a) (b) R 4 320 R 1 6k 1k R 3 Q 1 R 2 2k + - V i R S 100 C 2 500n C 1 10n C 3 -3 0 +3 +3 +3 -3 V o 0 8 2k R 3 Q 1 2k R 4 13k R 2 17k R 1 2k R 6 100 R 5 1u C 3 50n C 1 C 2 + - V i +3 +3 0 0 0 +3 0 V o (c) (d) R 4 1.7k R 2 10k R 1 15k + - V i R 5 650 R 3 2k Q 1 200 R 7 R 6 1k Q 2 300n C 1 100n C 4 C 2 C 3 +3 -3 0 -3 +3 0 +3 +3 -3 -3 V o 11k R 4 17k R 2 R 5 14k Q 2 2.5k R 6 8k R 1 C 1 1u R S 500 Q 1 1.5k R 3 + - V i 1u
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This note was uploaded on 02/16/2009 for the course ECEN 325 taught by Professor Silva during the Fall '08 term at Texas A&M.

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ex5 - BJT AMPLIFIERS Sample Problems - Dr. Aydn I. Karlayan...

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