Encoder's sinusoid output

[Ronishune]

Hi, How can an incremental encoder give out a sinusoid output?

 

[solvarg]

It can not.
In a typical resolver application you would se two sinussodial signals.

 

[Ronishune]

This is what Wikipedia says:

"A variation on the Incremental encoder is the Sinewave Encoder. Instead of producing two quadrature square waves, the outputs are quadrature sine waves (a Sine and a Cosine). By performing the arctangent function, arbitrary levels of resolution can be achieved."

You may also find useful documents in ELTRA's web-site about Incremental Encoders (If you didn't find it, I can send it to your email address,) But I still have some problems understanding how the Sinusoidal signal is made.