A cleaver design, but the OP wanted 1pps. I have the Leo Bodnar GPSDO. It too
is a nice frequency standard, but it doesn't know what time it is.
On 5/24/2016 9:53 AM, Graham / KE9H wrote:
If you want an "existence proof" for a simple, mostly analog, a few digital
counters, no software or microprocessor GPSDO, look at the "Miller" GPSDO.
He designed it for his own use, then put it into production because of
demand for a simple, cheap GPSDO. It has been characterized, and works
well for the simple circuit.
The schematics are published, since it started as a hobby project.
http://www.jrmiller.demon.co.uk/projects/ministd/frqstd0.htm
http://www.jrmiller.demon.co.uk/projects/ministd/frqstd.htm
You can buy his, or build your own with his design as a starting point.
He does use a GPS with 10 kHz output to simplify some of the timing and
integration issues Bob referred to.
--- Graham
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