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From: Hul Tytus <ht@panix.com>
Newsgroups: sci.electronics.design
Subject: Re: PID loop frequency
Date: Sat, 6 Oct 2018 18:49:20 +0000 (UTC)
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Xref: csiph.com sci.electronics.design:518563

Thanks Jon.

Hul

Jon Elson <elson@pico-systems.com> wrote:
> On Fri, 05 Oct 2018 19:52:00 +0000, Hul Tytus wrote:

> > A question regarding terms: what is a "linear encoder with quatrature
> > output" that produces "pulses"?
> There are things called linear encoders which produce a pair of square 
> wave signals that are 90 degrees out of phase with each other.  The phase 
> relationship allows you to determine direction of motion as well as 
> distance.  The signals are identical to rotary quadrature encoders.
> The 90 degree phase relationship is the definition of quadrature.

> The individual signals consist of pulses.

> Jon