ECEN 248: INTRODUCTION TO DIGITAL SYSTEMS DESIGN Lecture 5 Dr. Shi Dept. of Electrical and Computer Engineering
ECEN 248: INTRODUCTION TO DIGITAL SYSTEMS
DESIGN
Lecture 5
Dr. Shi
Dept. of Electrical and Computer Engineering
How are Gates Implemented? By Metal-Oxide-Semiconductor Field
Effect Transistor (MOSFET) PMOS if source/drain are p-type
semiconductor NMOS if source/drain are n-type
semiconductor CMOS (complementary MOS)
GATE
SOURCE DRAIN
Oxide 5 nm
Gate length 20 nm
Hair=0.1mm1000um=1mm1000nm=1um
High Fan in
Fan-in: Number of inputs Fan-out = Number of outputs
This gate has large fan in Large delay