I have to calculate the maximum shaft speed possible to maintain measurement reliability

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RsK's Avatar (by Gravatar)RsK posted on
November 6, 2006, 5:45 pm
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if a  photodiode with a rise time of 10 micro sec is used to detect the
light modulation through an optical encoder disk with 1000 lines on it.
how i can calculate the maximum shaft speed possible to maintain
measurement reliability. Assuming that the minimum output swing
required for the reliable operation of the circuit is 20% of the full
output.? examples please?


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Jerry Avins's Avatar (by Gravatar)Jerry Avins posted on
November 6, 2006, 9:28 pm
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Re: I have to calculate the maximum shaft speed possible to maintain measurement reliability



RsK wrote:

Tell us how you would attack this homework problem, and we'll try to
guide you to a reasonable approach if it seems you put some effort into it.

Assume that the fall time is the same as the rise time -- that's not
necessarily the case -- and determine the speed that allows full swing.

Jerry
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