q07 - 5mV i D = K v GS − V TO 2 r = ∞ g m = 2 √ KI D...

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ECE 3050 Analog Electronics Quiz 7 October 7, 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 The diagram shows the ac signal circuit for a MOSFET ampli f er. It is given that R 1 = 100 k , R 2 =1k , R 3 =30k , K =0 . 4mS , V TO =1 . 5V , I D =2
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Unformatted text preview: . 5mV , i D = K ( v GS − V TO ) 2 , r = ∞ , g m = 2 √ KI D , and r s = g − 1 m . (a) Solve for the small-signal voltage gain A v = v o /v i . (b) Solve for the input resistance looking into the v i node. (c) Solve for the output resistance looking into the v o node. A v = i s 1 v i × i s 2 i s 1 × i d 2 i s 2 × v o i d 2 = 1 r s 1 + r s 2 k R 2 × − R 2 R 2 + r s 2 × 1 × ( − R 3 ) = 24 r in = ∞ r out = R 3 1...
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