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

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.?
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You estimate how long the photodiode will take to rise 20% and then calculate how fast the wheel must be spinning to allow the window to be open for that long for each slot. Isn't this obvious? Are you trying to get us to do your homework for you?
--
Curt Welch http://CurtWelch.Com /
snipped-for-privacy@kcwc.com http://NewsReader.Com /
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On Nov 6, 11:50 pm, snipped-for-privacy@kcwc.com (Curt Welch) wrote:

Actually, it would seem he has succeeded.
Here's the next problem: http://groups-beta.google.com/group/sci.engr.control/browse_frm/thread/2409b4af71d38a81/7e95b140312626af
-chris

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