[time-nuts] WWVB for Time Nuts

Bob Camp kb8tq at n1k.org
Sat Aug 9 18:28:39 EDT 2014


Hi

 Doing CPU vs ASIC switch, going from 300 uA to 3 uA can matter a lot when you are on a little battery

If you are going to put these in 10,000,000  watches / clocks a month, then saving  twenty cents on a chip is a really big deal. Moving twenty cents a chip from your pocket to my pocket is enough to pay for a lot of development.. Yes, at that rate everybody in the country has a WWVB watch in three or so years. Cheap watch / clock lasts for a year or two …. How many watches and clocks are there around here…. Even at a couple million a year, the your pocket to my pocket math for the low power ASIC makes a lot of sense.

Bob

On Aug 9, 2014, at 5:42 PM, Ivan.Cousins <ijcousins at frontier.com> wrote:

> Time nuts:
> Here is a prediction of how it could go on the WWVB chip situation.
> Moors law will under price the custom chip price in small (and even large) volumes.
> 
> It already has.
> http://en.wikipedia.org/wiki/Moore%27s_law
> 
> A WWVB receiver can now be done on an Arduino microprocessor with a little help from an antenna.
> 
> The custom chip price will loose this battle.
> 
> The custom chip takes longer to develop.
> 
> A simple download can upgrade a simple carrier tracking receiver to a full demodulating receiver.
> 
> The web site that supplies that free software upgrade can be anywhere on this planet.
> 
> For lawyers to do their job they need a target.
> 
> Do not give them a target to aim at.
> 
> Or give them so many targets that they still can not do their job.
> 
> The antenna-receiver-Arduino board can be made in China and purchased on ebay.
> 
> I feel sorry for the team with patent(s), they are competing against the whole world, and do not know it yet.
> 
> 
> This is a prediction of how it could happen.
> 
> 
> Any takers.
> 
> 
> Ivan Cousins
> 
> 
> 
> On 8/9/2014 12:56 PM, Bob Camp wrote:
>> Hi
>> 
>> Keep in mind that the patent(s) do not keep you from building a part for your own use. Regardless of what they do / do not patent, a TimeNut can still build (and use for themselves) what ever they wish.
>> 
>> ————
>> 
>> Now, if you (after careful examination) believe that the privately held patents keep you from building a receiver for a Federally Funded service - talk to your elected representatives. They are the ones who can / will fire up a committee to look into this sort of stuff.  I think I would want to have some information on license costs before I made that phone call though.
>> 
>> Bob
>> 
>> On Aug 9, 2014, at 1:49 PM, Brooke Clarke<brooke at pacific.net>  wrote:
>> 
>>> Hi:
>>> 
>>> I've been reading papers by Yingsi Liang who works for Xtendwave and she seems to be the key person developing the new clocks.
>>> I've starting collecting info on my web page:
>>> http://www.prc68.com/I/Loop.shtml#PhaseMod
>>> I don't understand how Xtendwave can get patents when their work was partially funded by NIST?
>>> 
>>> There are different modes that have different frame times, the Long mode takes 17 minutes for each of: Time, DST/LY state&  Date. That's to say it takes 51 minutes to get all three.  Since the modulation format is in complete words their receiver has a problem with the inaccuracy of common watch crystals.  This says that for those who have a stable LO it's much easier to receive the BPSK signal over the times needed (probably for all formats).
>>> 
>>> PS a new paper "Receiver Design of Radio-Controlled Clocks Based On The New WWVB Broadcast Format" came out a few days ago.
>>> 
>>> PPS I've been having fun with theodolites and have made a table "Accuracy of Visual Fixes" on my Navigation page with columns headed Time, Angle&  Distance based on the Earth rotation at: http://www.prc68.com/I/Nav.shtml#Accuracy
>>> The idea is that a theodolite with some angular accuracy needs to be used with a clock that has a equivalent accuracy to get a position fix within some distance.
>>> 
>>> [OT] PPPS I'm also having fun looking at the pond water in my back yard.
>>> http://www.prc68.com/I/Labophot.html#Pond_Water
>>> 
>>> -- 
>>> Have Fun,
>>> 
>>> Brooke Clarke
>>> http://www.PRC68.com
>>> http://www.end2partygovernment.com/2012Issues.html
>>> http://www.prc68.com/I/DietNutrition.html
>>> 
>>> _______________________________________________
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>>> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>>> and follow the instructions there.
>> 
> 




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