[sdiy] more National App notes

[peff 2cv]

For those of you that don't already know there is a bonanza of app notes at

http://www.national.com/apnotes/apnotes_all_1.html

Sift through them and there are many relevant to SDIY. Some are very old and 
some are new but usually there are nice tidbits of circuits and theory. Some 
I downloaded are:

AN-30
AN-31
AN-262
AN-263
AN-299
AN-663
LB-5
LB-23
OA-21

There's plenty more so check out the ones of interest to you. Happy surfing.

Peff (not a NS employee)

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