---
title: How do Unidirectional and Bidirectional Encoders Differ?
description: A unidirectional encoder generates one signal as an output (signal A), while a bidirectional encoder generates two signals as output (signal A and B).
---

<https://www.dynapar.com/faq>

# [How do Unidirectional and Bidirectional Encoders Differ?](https://www.dynapar.com/faq/how-do-unidirectional-and-bidirectional-encoders-differ)

 Written by [London Rhodes](https://www.dynapar.com/faq/author/london-rhodes) | Mar 19, 2021 7:06:42 PM

A unidirectional encoder, also known as a single channel encoder, is primarily used for speed sensing applications. A single channel encoder only generates one signal  as an output (signal A).

A bidirectional encoder, also known as a dual channel encoder, is used in applications that require both speed and direction feedback. In this case, two signals are produced (signal A and signal B).

[View full post](https://www.dynapar.com/faq/how-do-unidirectional-and-bidirectional-encoders-differ)

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