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Discussion of precise voltage measurement

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Re: [volt-nuts] Transmille 8081

R
randyevans2688
Wed, Apr 22, 2015 11:27 PM

What is AOE3?
Randy Evans

Sent from my Verizon Wireless 4G LTE smartphone

-------- Original message --------
From: Poul-Henning Kamp phk@phk.freebsd.dk
Date: 04/22/2015  11:41  (GMT-08:00)
To: Ken.Peek@DiligentMinds.com, Discussion of precise voltage measurement volt-nuts@febo.com
Subject: Re: [volt-nuts] Transmille 8081


In message 1429713386.29372.25.camel@D2, Ken Peek writes:

and balancing JFET switch transitions
during an ADC cycle is the "secret sauce" that is at the heart of the
3458A's stellar INL spec.  No one else has that.  No one else ever will.
WAY too expensive for even Keysight to redesign these days.  Just is
not going to happen...

Sorry to burst your bubble, but I'm pretty sure that's an integral
feature of a number of ADC chips already.

Probably something about a patent expiring...

PS: There's a very instructive walk through the HP multislope in AOE3.
Doesn't really go into the 3458 much, but they lay out how the subsequent
versions in 34401/34972 do things.

--
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe   
Never attribute to malice what can adequately be explained by incompetence.


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What is AOE3? Randy Evans Sent from my Verizon Wireless 4G LTE smartphone -------- Original message -------- From: Poul-Henning Kamp <phk@phk.freebsd.dk> Date: 04/22/2015 11:41 (GMT-08:00) To: Ken.Peek@DiligentMinds.com, Discussion of precise voltage measurement <volt-nuts@febo.com> Subject: Re: [volt-nuts] Transmille 8081 -------- In message <1429713386.29372.25.camel@D2>, Ken Peek writes: >and balancing JFET switch transitions >during an ADC cycle is the "secret sauce" that is at the heart of the >3458A's stellar INL spec.  No one else has that.  No one else ever will. >*WAY* too expensive for even Keysight to redesign these days.  Just is >not going to happen... Sorry to burst your bubble, but I'm pretty sure that's an integral feature of a number of ADC chips already. Probably something about a patent expiring... PS: There's a very instructive walk through the HP multislope in AOE3. Doesn't really go into the 3458 much, but they lay out how the subsequent versions in 34401/34972 do things. -- Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG         | TCP/IP since RFC 956 FreeBSD committer       | BSD since 4.3-tahoe    Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
AB
Azelio Boriani
Wed, Apr 22, 2015 11:54 PM

The Art of Electronics, by Paul Horowitz and Winfield Hill is a
popular textbook dealing with analog and digital electronics. The
third edition has been released in April 2015.

On Thu, Apr 23, 2015 at 1:27 AM, randyevans2688
randyevans2688@gmail.com wrote:

What is AOE3?
Randy Evans

Sent from my Verizon Wireless 4G LTE smartphone

-------- Original message --------
From: Poul-Henning Kamp phk@phk.freebsd.dk
Date: 04/22/2015  11:41  (GMT-08:00)
To: Ken.Peek@DiligentMinds.com, Discussion of precise voltage measurement volt-nuts@febo.com
Subject: Re: [volt-nuts] Transmille 8081


In message 1429713386.29372.25.camel@D2, Ken Peek writes:

and balancing JFET switch transitions
during an ADC cycle is the "secret sauce" that is at the heart of the
3458A's stellar INL spec.  No one else has that.  No one else ever will.
WAY too expensive for even Keysight to redesign these days.  Just is
not going to happen...

Sorry to burst your bubble, but I'm pretty sure that's an integral
feature of a number of ADC chips already.

Probably something about a patent expiring...

PS: There's a very instructive walk through the HP multislope in AOE3.
Doesn't really go into the 3458 much, but they lay out how the subsequent
versions in 34401/34972 do things.

--
Poul-Henning Kamp      | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG        | TCP/IP since RFC 956
FreeBSD committer      | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.


volt-nuts mailing list -- volt-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
and follow the instructions there.


volt-nuts mailing list -- volt-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
and follow the instructions there.

The Art of Electronics, by Paul Horowitz and Winfield Hill is a popular textbook dealing with analog and digital electronics. The third edition has been released in April 2015. On Thu, Apr 23, 2015 at 1:27 AM, randyevans2688 <randyevans2688@gmail.com> wrote: > > > What is AOE3? > Randy Evans > > > Sent from my Verizon Wireless 4G LTE smartphone > > -------- Original message -------- > From: Poul-Henning Kamp <phk@phk.freebsd.dk> > Date: 04/22/2015 11:41 (GMT-08:00) > To: Ken.Peek@DiligentMinds.com, Discussion of precise voltage measurement <volt-nuts@febo.com> > Subject: Re: [volt-nuts] Transmille 8081 > > -------- > In message <1429713386.29372.25.camel@D2>, Ken Peek writes: > >>and balancing JFET switch transitions >>during an ADC cycle is the "secret sauce" that is at the heart of the >>3458A's stellar INL spec. No one else has that. No one else ever will. >>*WAY* too expensive for even Keysight to redesign these days. Just is >>not going to happen... > > Sorry to burst your bubble, but I'm pretty sure that's an integral > feature of a number of ADC chips already. > > Probably something about a patent expiring... > > PS: There's a very instructive walk through the HP multislope in AOE3. > Doesn't really go into the 3458 much, but they lay out how the subsequent > versions in 34401/34972 do things. > > -- > Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 > phk@FreeBSD.ORG | TCP/IP since RFC 956 > FreeBSD committer | BSD since 4.3-tahoe > Never attribute to malice what can adequately be explained by incompetence. > _______________________________________________ > volt-nuts mailing list -- volt-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > and follow the instructions there. > _______________________________________________ > volt-nuts mailing list -- volt-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > and follow the instructions there.