You might be. but the rest of us don't set a date to die by. You give a whole new meaning to 'Expiration Date'! ;-)
-- Service to my country? Been there, Done that, and I\'ve got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida
Ahah - it uses the LT1228 as the variable-gain block. Remarkable part, I forgot that I had used it several years ago. Thanks so much for pointing that out! In a thread that started with a clipping oscillator tweaked to not get more than a few percent distortion, we evolved to the true-state-of-the-art ppb-level oscillator in a rather stellar manner.
The LT1228 of course goes way higher than audio frequencies. Gives me interesting ideas for low-distortion AGC of RF oscillators...
Tim.
IIRC it works best with about a 30mV input swing. If you have a widely varying signal, you can do something like:
---------- ! ! Vin --------/\\/\\---+--!- \\ ! ! >---+--!+\\ GND-------!+ / ! >----- ! --!-/ Iset ! !
The Iset is adjusted to always keep the input swing about the same.
ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.