13 POINTS A) FOR EACH OF THE FOLLOWING BIAS VOLTAGES, SPECIFY THE REGION OF OPERATION (CUTOFF, TRIODE, OR SATURATION)
23. MOSFET Currents: 13 points
a) For each of the following bias voltages, specify the region of operation (cutoff, triode, or
saturation). Assume Vtn = |Vtp| = 0.5V.
i) nMOS with V
D
= 2V, V
G
= 1V, and V
S
= 0V.
REGION:
ii) nMOS with V
D
= 2V, V
G
= 0V, and V
S
= 1V.
iii) pMOS with V
D
= 2V, V
G
= 1V, and V
S
= 3V.
iv) pMOS with V
D
= 0V, V
G
= 1.5V, and V
S
= 3V.
b) For case (i) above, calculate the nMOS drain current neglecting body effect and channel
length modulation and do not adjust for effective channel length.
Assume W=1.8
µµµµm, L=0.6
µµµµm and
µµµµCox = 50
µµµµA/V.
ANSWER:
I
D