Question

difference between synchronous and asynchronous counter​

Answer 1

Answer:

DIFFERENCE;

Synchronous Counter

• There is no connection between o/p of first flip-flop and clock of next flip-flop.
• Flip-flops are clocked simultaneously.
• Circuit becomes complicated as number of states increases.
• Speed is high as clock is given at a same time.
• , the external event is used to produce a pulse that is synchronised with the internal clock.
• All flip flops are applied with same clock
• It is faster in operation
• any count sequence is possible
• It produces no decoding error.

Asynchronous Counter​

• Flip flops are connected in such a way that the o/p of first flip-flop drives the clock of next flip-flop.
• Flip-flops are not clocked simultaneously.
• Circuit is simple for more number of states.
• Speed is slow as clock is propagated through number of stages.
• are also known as “Ripple Counter” because of the way the clock pulses or ripples, its way through the flip-flop.
• an external event is used to directly SET or CLEAR a flip-flop when it occurs.
• It is slower in operation
• Different flip flops are applied with different clocks
• fixed count sequence either up or down
• produces decoding error

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