[time-nuts] Ultra low power RTC

Bob kb8tq kb8tq at n1k.org
Wed Mar 7 17:06:43 UTC 2018


Hi

Ok, so energy harvesting from Lazy Bob in his arm chair makes a button cell 
look like a giant power source ….. 

You likely aren’t going to win any ADEV competitions with that oscillator. They
did go to a *lot* of effort to squeeze out that last nano watt.

Bob

> On Mar 7, 2018, at 11:47 AM, Tom Van Baak <tvb at leapsecond.com> wrote:
> 
>> Since we don’t often *need* the smallest cell made *and* we’re probably 
>> talking lifetime of the cell….. does 22 na vs 33 na matter?
> 
> It gets even more amazing ...
> 
> "A 1.5 nW, 32.768 kHz XTAL Oscillator Operational From a 0.3 V Supply"
> https://web.northeastern.edu/ecl/wp-content/uploads/2016/12/xtal.pdf
> 
> /tvb
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