[volt-nuts] Is there a "standard" much better than a LTZ1000, but much cheaper than a Josephson Junction Array?
Dr. David Kirkby
drkirkby at gmail.com
Wed Oct 19 23:14:51 EDT 2016
-------- Original message --------
From: Poul-Henning Kamp
Date:20/10/2016 00:08 (GMT+00:00)
To: Discussion of precise voltage measurement ,"Dr. David Kirkby (Kirkby Microwave Ltd)"
Subject: Re: [volt-nuts] Is there a "standard" much better than a LTZ1000, but much cheaper than a Josephson Junction Array?
In message <CANX10hCbbrWvtQhybFf-Pm1uaSyZ3agHLEo8p_5iyoyYR-gP8Q at mail.gmail.com>
, "Dr. David Kirkby (Kirkby Microwave Ltd)" writes:
>The question about the Josephson Junction Array got me thinking. I wonder
>if there are any sort of technologies that can produce a voltage with much
>better stability than the LTZ1000, but without the cost of a Josephson
>Junction Array. A sort of half-way house.
As far as I know there are only two steps between the LTZ1000 and JJAs:
1. Specially cared for LTZ1000's (See: Fluke)
2. Lots of LTZ1000's to get sqrt(N) reductions.
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
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