Please take a minute to review and accept our Terms of Use.
Welcome to the PLECS User Forum, where you can ask questions and receive answers from other members of the community.

Many technical questions regarding PLECS are answered on the Technical Solutions page of our website. Tutorial videos, specific application examples, and pre-recorded webinars are available on our YouTube page. Please follow us on LinkedIn for the latest Plexim news.

How to get a pure bias value with zero-order holder

0 votes
275 views
A bias value 2 is given to sinwave, T is 0.5, and i want to get it using ZOH with a sample time 0.25, but the error is bigger with time,why? and how to get the pure bias value?

the simple example is attached.
asked Aug 9, 2022 by fire (73 points)

1 Answer

0 votes
 
Best answer

The error here is on the order of 1e-15 in the first 2 seconds and will increase as the time increases.  For example, at 200 seconds the error is on the order of 1e-13. 

The reason the value you're observing in the scope is close-to, but not exactly, 2 is because of limitations of floating point arithmetic.

answered Aug 9, 2022 by Bryan Lieblick (1,995 points)
selected Feb 14, 2023 by fire
...