S2011 EEE 3308C Quiz 8_sol

# S2011 EEE 3308C Quiz 8_sol - (4pts) R i , R o , and A v ,...

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EEE 3308C Spring 2011 Name________________ Quiz No. 8 UFID ________________ Lab session _____________ The parameters of the BJT amplifier are: = 100, I C = 1mA, R C = 5k , R sig = 5k , R L = 5k , and R E1 = 0 . R B = 50 k , V A = a) (3pts) What is the amplifier type? Common Emitter (CE) b) (3pts) Calculate g m , r , r o at Room Temperature. g m = (I c /V T ) = (1mA/25 mV) = 0.04 = 40 mA/V r = /g m = 100/0.04 = 2.5 k r o = V A /I c = /1mA = c)
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Unformatted text preview: (4pts) R i , R o , and A v , and the overall gain G v ? R i = R B //r = 50 k//2.5k = (50 x 2.5)/(50 +2.5) = 2.38 k R o = R c = 5 k (this does not include R L as indicated in the figure.) A vo = - g m R c = - 0.04 x 5k = - 200 [V/V] A v | RL = - g m (R c // R L ) = - (0.04) (5k//5k) = - 100 [V/V] G v = (R i /(R i +R sig )) A v = (2.38/(2.38+5)) 100 = 32.2 [V/V] R i R o...
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## This note was uploaded on 07/28/2011 for the course EEL 3308C taught by Professor Yoon during the Spring '11 term at University of Florida.

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