what is the difference between buffering and latching?

Question

"buffering an input or output" , and "latching an input or output"
what's the difference between the above two terms

Answer 1

Buffering means the logic signal is isolated by the addition of a buffer, usually a non-inverting gate. This prevents loads and other effects on the output of the buffer from affecting the signal at the input to the gate.



Latching means the signal is stored in a latch or flip-flop. A clock signal is needed to control the latch. This will keep the signal stored in a memory element irregardless of the state of the signal.



Bottom line, they are different processes that serve different purposes.



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Answer 2

There is no context here. If you refer to electronics, then a buffer is a separator that prevents a downstream section from placing a load on an upstream section. The signal is transferred, but not the load. It is like using a telephone to call your next door neighbor instead of shouting to him across the street. A latch circuit is like a light switch, stable in one of two possible conditions. A flip-flop is such a circuit. Once I "set" it in a condition by using a trigger to toggle the state, it stays that way as long as it remains energized. Most flip-flops are slightly off balance, so on startup, they favor a known state without having to use a separate reset trigger. The problem with your question is context... A buffer COULD be a floor polishing device, a chemical solution which controls the pH of a solution, or a spring between two railroad cars coupled together as are used in Europe but not the US. A latch COULD be the thing which is what is spring loaded which holds your front door closed, or the hook on a kitchen cabinet door to keep children out or the thing which holds the trunk lid of your car closed.

Answer 3

Latch is something once enabled holds the value for infinite time as

long has it has Vcc and ground connections.



Buffer is something which holds the value for finite time during which

you need to read it. It can essentially be a part of sample and hold

circuit.