0195136047.pdf

PROBLEMS 391

+

+

+

+

+ −

−

G

RD

iG = 0

iD

VDD

VGG

vg = √ 2 Vg sin ωt vG

vD

Figure P7.4.6

ID, mA

VGS, V

VDS, V

VGS = 0 V

−0.5 V

−1 V

−2 V

−2.5 V

−3 V

−4 V

−1.5 V

ID, mA

0

0

10

8

6

4

2

0
02816 20 24
(b)

(a)

4368 12 32

− 5 − 4 − 3 − 2 − 1

10

8

6

4

2

Figure P7.4.7JFET characteristics.(a)Transfer characteristic.(b)Output characteristics.