[time-nuts] Microstepper

[Magnus Danielson]

Hi,

Many thanks for those references. Downloaded and stored for future
reference and reading.

Check out US4358741 and US4417352.

Cheers,
Magnus

On 2020-01-02 18:10, Anders Wallin wrote:
> fwiw, looks like the spectradynamics patent expired today:
> https://patents.google.com/patent/US6278330B1/en
> afaik that design (more or less) is also described in
> https://doi.org/10.1109/FREQ.1998.717932
> a variation is also https://doi.org/10.1109/EFTF.2012.6502322 (which might
> be sold by http://www.skk.it/index.htm - but that website is a bit
> spartan..)
> (if anyone knows more micro-stepper papers, please post!)
>
> my plan is to present our DIY version of this, an open hardware design, at
> EFTF2020.
> we have two AD9912:s clocked at 1GHz (derived from the maser) producing two
> LO's that drive a mixer-board that locks an OCXO that feeds a PICDIV.
>
> Anders
>
>
>
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