What is an Active*low*Input*and edge* triggered input?

[mm391]

What is an "Active*low*Input*and edge* triggered input?"

I have been reading up on Flip Flops but can't find anywhere that explains in simple terms what an Active low input and edge triggered input are. Can someone help me understand it please?

Thanks

 

[FOIWATER]

Active low means it gives a "True" value when the output value is 0

Edge triggered means it is triggered on either a 1 or 0. Just a change triggers it, look at the square wave, any time an edge occurs, that is to say anytime the input state changes from 0 to 1, or 1 to 0, it is triggered.

 

[Bobbywhy]

http://en.wikipedia.org/wiki/Flip-flop_(electronics )

 

[FOIWATER]

Although, what I said may be confusing in terms of a flip flop, if its constructed using NOR gates two inputs and two outputs.

If it is active low, than in the truth table, what gives you a 1 and 0 output, the inputs are opposite than what the normal truth table would be. The non responsive inputs/toggle bits/ whatever remain the same though.

 

[alphysicist]

for your question. An active low input, also known as a negative logic input, is a type of input signal that is considered "active" or "on" when it is at a low voltage level. In contrast, an active high input is considered active when it is at a high voltage level. This terminology is commonly used in digital electronics, where a logic level of 0 (low) represents a binary value of 0 and a logic level of 1 (high) represents a binary value of 1.

An edge triggered input is a type of input signal that is used to trigger a change in the state of a circuit, typically a flip flop. It is activated when there is a transition from one logic level to another, either from low to high or from high to low. This can also be referred to as a "rising edge" or "falling edge" trigger.

Combining these two concepts, an active low and edge triggered input would refer to an input signal that is active when it is at a low voltage level and is used to trigger a change in the state of a circuit when there is a transition from low to high or high to low. This type of input is commonly used in flip flops and other sequential logic circuits. I hope this helps to clarify the concept for you.