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Thread: [EE] 24-bit A/D. Are We in the Twilite Zone Here?
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face BY : Andrew Kunz email (remove spam text)



James,

What we would do is measure an analog signal using the time-honored cap/res
delay time with a PIC.  Our time was typically 10-50, where our signal was
acquired (sample-and-hold setup).

Then we would add a random number to this in the range 0-15.  The random number
could come from any of a number of places; ours was the CRC of the last message
we received (we were continuously receiving messages).

These results were then continuously averaged (Avg = ((sum of samples) - Avg) +
newsample).

The result was surprisingly accurate.

Andy

PS.  To whomever I was going to fax yesterday, never mind.  The above is what I
really wanted to show you.

<852568D5.005E0693.00@transdev.com>

See also: www.piclist.com/techref/io/atod.htm?key=a%2Fd
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Subject (change) [EE] 24-bit A/D. Are We in the Twilite Zone Here?

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