On Dec 11, 2007 3:53 PM, Bruce Griffiths <[EMAIL PROTECTED]> wrote: > > If you want simplicity and higher performance you can do far better with > fewer parts, > An expensive high resolution DAC can be replaced with a software > sigma-delta DAC that has higher resolution. > The complex phase detector can be replaced with a D flipflop. > Add a microprocessor plus an opamp or 2 to filter and scale the EFC > voltage and thats about all thats required in addition to a good GPS > timing receiver. > For improved performance a hardware circuit to correct the PPS sawtooth > error will improve the medium term stability significantly when using a > high performance GPS timing receiver that provides an estimate of this > error.
You have made similar comments about I believe the same approach in the past. I was wondering if you have ever sketched out a schematic, even if only rough. Perhaps with a few suggested components to try (i.e. DAC, Op-Amp) that would be a good starting point for anyone who wanted to prototype and evaluate the performance of this approach. It is beyond my elementary design abilities to convert your description into a well implemented design on my own, but I would be interested in try to at least see if I could construct an unit using these suggested techniques. -Michael _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.