q06 - ECE 3050 Analog Electronics Quiz 6 September 30, 2009...

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ECE 3050 Analog Electronics Quiz 6 September 30, 2009 Professor Leach Name Instructions. Print your name in the space above. Place a box around your answers. Points will be subtracted if you do not express each numerical answer as a decimal number and if you do not put a box around answers. Honor Code Statement: I have neither given nor received help on this quiz. Initials 1. The f gure shows the ac signal circuit for a di f erential ampli f er. For each BJT, it is given that α =0 . 99 , β =99 , r x , g m =49 . 5mS , r π =2k , r e =20 , r 0 = , R B =1k , R E =70 , R Q =50k ,and R C =12k . (a) Replace v s 1 and v s 2 with di f erential inputs. Solve for the di f erential gain A v ( d ) = v o 1 /v id . (b) Replace v s 1 and v s 2 with common-mode inputs. Solve for the common-mode gain A v ( cm ) = v o 1 /v icm . (c) What is the common-mode rejection ratio?
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q06 - ECE 3050 Analog Electronics Quiz 6 September 30, 2009...

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