0195136047.pdf

446 DIGITAL CIRCUITS

0241

t, ms

vin, V

10

6

20

3

Figure P9.3.4Input voltage as a function of

time.

vout

VDD = 7 V

p-channel

MOSFET

n-channel

MOSFET

ID 2

ID 1

S 2

S 1

T 1

T 2

D 2

D 1

vin

(a)

Figure P9.3.5(a)Typical CMOS inverter.(b)Characteristics

ofT 1.

vDS, V

iD, mA

2 4 6 8 10

1.0 Ohmic or

triode region

(b)

Pinch-off or active region

0.8

0.6

0.4

0.2

0

vGS = 7 V

vGS = 6 V

iS

iD

S

G

D

vGS = 5 V

vGS ≤ 3 V

vGS = 4 V