Bruce Griffiths wrote:
Additional references that estimate the degree of tank mistuning permissable before asynchronous modes occur:Hal Murray wrote:Asynchronous modes such as 10.000001MHz plus 15.999999 MHz can be problematic if the loop delay is too high. http://www.femto-st.fr/~rubiola/pdf-articles/journal/1992im%28rubiola%29regenerative-divider-noise.pdf <http://www.femto-st.fr/%7Erubiola/pdf-articles/journal/1992im%28rubiola%29regenerative-divider-noise.pdf>[email protected] said:The 16MHz is necessary for the loop to function: The mixer mixes down theWhat makes it stable at 10 and 16 MHz rather than 10.000001 and 15.999999?26MHz to a pair of conjugate frequencies, 10MHz and 16MHz. Thermal and device noise is sufficient to start the process. 10MHz = 26MHz - 16MHz 16MHz = 26MHz - 10MHzI'm assuming we are starting with a good 26 MHz crystal and that it would be hard to get filters that good.http://ieeexplore.ieee.org/Xplore/login.jsp?url=http%3A%2F%2Fieeexplore.ieee.org%2Fiel5%2F26%2F23863%2F01093262.pdf%3Farnumber%3D1093262&authDecision=-203 <http://ieeexplore.ieee.org/Xplore/login.jsp?url=http%3A%2F%2Fieeexplore.ieee.org%2Fiel5%2F26%2F23863%2F01093262.pdf%3Farnumber%3D1093262&authDecision=-203>http://tf.nist.gov/general/pdf/1800.pdf Bruce
http://www.its.caltech.edu/~kaushiks/KS_RFIC.pdf <http://www.its.caltech.edu/%7Ekaushiks/KS_RFIC.pdf>
http://www.its.caltech.edu/~kaushiks/KS_TCAS.pdf <http://www.its.caltech.edu/%7Ekaushiks/KS_TCAS.pdf>
An early implementation:http://www.dtic.mil/cgi-bin/GetTRDoc?Location=U2&doc=GetTRDoc.pdf&AD=ADA457231 <http://www.dtic.mil/cgi-bin/GetTRDoc?Location=U2&doc=GetTRDoc.pdf&AD=ADA457231>
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