Hi!

Can anyone tell me about the different encoder interfaces and which among them is efficient?

 

There 1.622 zillion encoder interfaces at last count . The most appropriate on depends mainly on the encoder and the environment.

Is your question for a specific application, and can you describe the application?

 

Replace "efficient" with "useful in some specific application" and you have a better starting point.

Just what do you need to encode?

 

Hi!

Can anyone tell me about the different encoder interfaces and which among them is efficient?

I'll give it an answer. Gray code. Great for a rotating media since only one bit changes at a time.

Gray Code

0 0 0 0
0 0 0 1
0 0 1 1
0 0 1 0
0 1 1 0
0 1 1 1
0 1 0 1
0 1 0 0
1 1 0 0
1 1 0 1
1 1 1 1
1 1 1 0
1 0 1 0
1 0 1 1
1 0 0 1
1 0 0 0

The decoder was the TTL chip 7444, but you would be hard pressed to find one today. They pretty much went out of use with punched card readers.

 

They pretty much went out of use with punched card readers.

IIRC, a mode C aircraft transponder utilizes a modified Gray code for altitude encoding.

Oh, wait. You meant the IC.