[time-nuts] Frequency division by 81

[Poul-Henning Kamp]

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> I need to divide the output of an OCXO by a factor D=81 for testing purposes. So with minimum added phase noise.

Two stages of divide by 9 PI-dividers ?

	http://rubiola.org/pdf-articles/conference/2013-ifcs-Frequency-dividers.pdf

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