differences between synchronous and asynchronous logic circuits?

Answer 1

Synchronous circuits change states based on some periodic timing signal transitions. But asynchronous circuits change states when an "event" occurs and holds that state until another "event" occurs. "Events" are not necessarily periodic. Therefore asynchronous circuits are fundamentally different from the synchronous ones: they also assume binary signals, but there is no common and discrete time. Instead the circuits use handshaking between their components in order to perform the necessary synchronization, communication and sequencing of operations.

Answer 2

Differences Between Synchronous And Asynchronous

Answer 3

In asynchronous circuits, each event is triggered by some other event within the circuit, and the timing of such events depends on the sequence triggering the event. Any variations in the timing of the preceding sequences will vary the time of occurance of the event. In synchronous circuits, events are tied to a "clock", and events can occur only at "clock times". This means despite timing variations within each logic step preceding the event, the final event will always occur at a clock pulse, and timing accuracy can be maintained.

Answer 4

Synchronous means that the count is equal bi-directionally. Asyncronous means the count can be of diffirent values in either direction.