On Tue, Sep 25, 2012 at 7:19 PM, Hal Murray <hmur...@megapathdsl.net> wrote:
> > How good a clock could you get at much lower power? I guess I'm looking > for something (logarithmically) between a watch and a GPSDO. > The trick to ultra-low power, I think, is to not run the GPS receiver full time. If you literally want something between a wrist watch and a GPSDO then build a "GPS disciplined wrist watch" GPSDWW. Let the watch run open loop until say an hour then turn on the GPS for a few seconds, adjust the watch then power off the GPS. Likely you'd use something better then a watch crystal but almost as low power Rather then spend a lot of energy with a heater and oven to stabilize the temperature I think you can dig a deep hole in the ground like a well and burry the oscillator and have an ultra stabile temperature for years. Chris Albertson Redondo Beach, California _______________________________________________ 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.
