# q02 - f ed T model to solve for A v = v o/v s r in and r...

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ECE3050Ana logE lectron icsQu iz2 May 27, 2009 Professor Leach Last Name: First Name: Instructions. Print your name in the spaces above. Place a box around any answer. Honor Code Statement: I have neither given nor received help on this quiz. Initials i 0 c = g m v π = βi b = αi 0 e g m = I C V T β = g m r π a = β 1+ β r π = V T I B r e = V T I E r 0 e = R tb + r x 1+ β + r e I C = βI B = αI E 1 of 2. Replace the circuit seen looking out of the base with a Thévenin equivalent and solve for the collector current I C for V + =15V , R 1 =4k , I 1 =3mA , R C =1 . 2k , R E =1 . 1k , V BE =0 . 65V ,and β =49 . V p 15 R 1 4000 R E 1100 R C 1200 V BE 0.65 β 49 I 1 0.003 α β 1 β α 0.98 = I C V p I 1 R 1 . V BE R 1 β R E α I C 1.952 10 3 = V CB V p I C R C . I C α R E . V BE V

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2 of 2. For the ac signal circuit circuit shown, use the simpli
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Unformatted text preview: f ed T model to solve for A v = v o /v s , r in , and r out for R S = 75 Ω , R B = 100 Ω , R C = 12k Ω , I E = 1mA , r x = 50 Ω , α = 0 . 99 , r = ∞ , and V T = 0 . 025V . R S 75 R B 100 R C 12000 I E 0.001 r x 50 V T 0.025 α 0.99 β α 1 α β 99 = r e V T I E r e 25 = r' e R B r x 1 β r e r' e 26.5 = v s 1 i' e v s R S r' e i' e 9.852 10 3 = i' c α i' e . i' c 9.754 10 3 = v o i' c R C . v o 117.044 = This is the voltage gain v o v s . r in r' e r in 26.5 = r out R C r out 1.2 10 4 = 2...
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q02 - f ed T model to solve for A v = v o/v s r in and r...

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