13-09-2012, 09:55 AM
Lecture on Flip-Flops
FF-Lecture.ppt (Size: 155 KB / Downloads: 251)
Level-Sensitive Flip-Flop
NMOS transistor often replaced with “transmission gate”
“Transmission gate” includes both NMOS and PMOS transistors because NMOS good at passing “0” and PMOS good at passing “1”
Using Logic Gates to Build Flip-Flops
From previous slides, you can see that it’s possible to build an edge-triggered flip-flop using just 8 transistors
In a conventional “Digital Logic” course, transistor-level flip-flop designs are not usually taught
Instead, flip-flop designs using “cross-coupled” logic gates are usually taught