Example: 2-bit Synchronous Counter
This behaves like a counter (e.g., 00 -> 01 -> 10 -> 11)
Q: What is the problem with async design? A: Noise
Synchronous Counter: Counter in which the CK input with all the flip-flops uses the same source and produces the output at the same time.
Sync v.s. Async Counter:
- Async.: Flip-flops are triggered by the output of the preceding flip-flop.
- aka: ripple counter
- Sync: All flip-flops are triggered simultaneously by a common clock signal.
- This ensures all state changes occur.
Example: 2-bit Synchronous Counter
This behaves like a counter (e.g., 00 -> 01 -> 10 -> 11)