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I I I I I I I I &\ (o) 't-+ {r-* - \-- -7 c o -6 -5 t -4 c o ) C' +3 -5 .+2 e +l Gote-source olfogeVcs,V v Droin-sou (b) -. Fig.54 a :t . I l...

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&\ I I I I I I I I t I I I t I I I I t (o) 't-+ {r- \-- -* - +3 .+2 e +l Gote-source volfoge Vcs,V Droin-sou (b) Fig.54 -. . I l. What is the Q-point gate-to-source voltage Question 9? -, a (l)-2.5v.10t)r -r v frlt-rov of the amolifier in (4)Cannot be determined u,ith the information siven Questions 12 to 15 pertain to the circuit and ffansfer characteristics in Fig. 53. 12. An enhancement MOSFET amplifier is shown in Fig. 53(a;. What is the ll tt- / , Q-point gate-to-source voltage? _=--- \ )\ t!(r r -s v (z) -7 y (3) -2.7s y (4) -6 v ,l r I r l/-1 | tL L c o c o ) C' a :t Vcs 13. What is the Q-point drain current for the amplifier in Question 12? -7 -6 -5 -4 -5 (1) 1 mA (2)7 mA f,3) 3 me (4) 5 mA
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69 14. If the Q-point drain voltage is -10 V, determine the value of the drain resistance Rp. ( I ) 3.s8 kQ X (2) 5 kQ (3) 2s kQ (4) 8.33 kO f S. ff the for,*'ard transconductance gfs of the.amplifier is 4000 Fmhos, determine the volta_ee gain. (l ) -20 ((l) -2s (3) -250 (4) -r5 Questions 16 to 19 pertain to the circuit and JFET characteristics shown in Fig. 54. 16. The JFET amplifier in Fig.54 is to so o€ttefiFat ee Q-poinr drain current and drain-to-.our"! voltagi uEY.j ila and -15 Yispectivety. What is the Q-point gate-to-source voltage? (l)+ l V Ct2)+2.5V f.(3)+ l.5v (4)+3.0V qv 17. For the amplifier of Question 16, determine the required value of R5. v f ,l r I kQ X(2) 600 O (3) 1.2 kQ (4) 400 Q 18. \\'hat is the required value of Ro? ( r ) 8.8 ko €) 10.0 k0 (3) 9.6 ko (4) 9.0 kf) 19. If gr* is equal to 3330 pmhos, determine the voltage gain of the amplifier. (tt -16.7 fQ) -1r.8 x (3) -1e5_ (4) e.OQ (Hint: Topic 7 Ex.4thenA$. Ex. 6 prob. 1 b.) " ' ; I I I I t I T T I I
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FET_Solutions.docx

Solutions:
11. Option 2 (-1V)
12. Option 1 (-5V)
13. Option 3 (3mA)
14. option 4 (8.33)
16. option 1 (1V)
17. option 4 (400 ohm)
18. option 3 (9.6)
19. option 2 (-11.8)

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