Types of Counters
- Ripple/Asynchronous counter
- synchronous counter
Ripple or Asynchronous Counter
The subsequent flipflop gets the clock input from the previous output
Synchronous Counter
All the flipflops get separate clock
- Up Counter
- Down Counter
- Up Down Counter
Differences between Asynchronous Counter and Synchronous Counter.
3 Bit Asynchronous Up Counter
Logic design (JK Flipflop)
Clock Diagram
4 Bit Asynchronous Up Counter – T flipflop
3 Bit Asynchronous Down Counter – two type
3Bit & 4 Bit UP/DOWN Ripple Counter
a mode control input (M) is used
Modulus of the counter & Counting up to a Particular Value
State Diagram of a Counter
Decade (BCD) Ripple Counter
Design of Synchronous Counters
2 bit Synchronous up counter – JK flipflop
3 bit Synchronous up counter – T flipflop
3 bit & 4 bit up/down synchronous counter
Ring Counter
application of shift register
output of last ff is connected to the first ff
preseted 1 is shifted 1 bit per clock cycle.