Encoder: Difference between revisions

Revision as of 05:56, 19 September 2019

Revision as of 22:40, 19 November 2019

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AnA ''''encoder'''' is a device, circuit, transducer, software program, algorithm or person that [[encoding|converts]] information from one format or [[code]] to another, for the purpose of standardization, speed or compression.

==Examples==

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===Transducers===

Transducers (such as optical or magnetic encoders) sense position or orientation for use as a reference or active feedback to control position:

* A [[rotary encoder]] converts the rotary position to an analog (e.g., analog quadrature) or digital (e.g., digital quadrature, 32-bit parallel, or USB) electronic signal.

* A [[linear encoder]] similarly converts the linear position to an electronic signal.

Such encoders can be either absolute or incremental. The signal from an absolute encoder gives an unambiguous position within the travel range without requiring knowledge of any previous position. The signal from an [[incremental encoder]] is cyclical, thus ambiguous, and requires the counting of cycles to maintain absolute position within the travel range. Both can provide the same accuracy; the absolute encoder is more robust to interruptions in transducer signal, whereas the incremental encoder reports position changes in real -time.

===Telecommunications===