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REF-01

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John Larkin
Guest

Wed Apr 29, 2020 10:45 pm   



I was looking for a fairly steady input to my VCO, to check frequency
stability, and remembered my old 10 volt REF-01 box. It's powered by a
14 volt wall-wart. I built and tweaked it about 10 years ago.

https://www.dropbox.com/s/6h6wrorcfjuvgev/REF-01_box.jpg?raw=1

https://www.dropbox.com/s/vrmh3il9ru9lvxm/REF-01_volts.jpg?raw=1



--

John Larkin Highland Technology, Inc
picosecond timing precision measurement

jlarkin att highlandtechnology dott com
http://www.highlandtechnology.com


Guest

Wed Apr 29, 2020 11:45 pm   



Presumably it has high input resistance so you can RC filter the heck out of it

George Herold
Guest

Wed Apr 29, 2020 11:45 pm   



On Wednesday, April 29, 2020 at 5:37:19 PM UTC-4, John Larkin wrote:
Quote:
I was looking for a fairly steady input to my VCO, to check frequency
stability, and remembered my old 10 volt REF-01 box. It's powered by a
14 volt wall-wart. I built and tweaked it about 10 years ago.

https://www.dropbox.com/s/6h6wrorcfjuvgev/REF-01_box.jpg?raw=1

https://www.dropbox.com/s/vrmh3il9ru9lvxm/REF-01_volts.jpg?raw=1


Nice. I used a 10V Ref01 with 0.1% R's as a current source
(compliance voltage sucked.. ~6V.)

George H.
Quote:

--

John Larkin Highland Technology, Inc
picosecond timing precision measurement

jlarkin att highlandtechnology dott com
http://www.highlandtechnology.com


Phil Hobbs
Guest

Thu Apr 30, 2020 12:45 am   



On 2020-04-29 17:37, John Larkin wrote:
Quote:

I was looking for a fairly steady input to my VCO, to check frequency
stability, and remembered my old 10 volt REF-01 box. It's powered by a
14 volt wall-wart. I built and tweaked it about 10 years ago.

https://www.dropbox.com/s/6h6wrorcfjuvgev/REF-01_box.jpg?raw=1

https://www.dropbox.com/s/vrmh3il9ru9lvxm/REF-01_volts.jpg?raw=1




I used to use a fair number of those in one-offs. The temperature
output was useful too.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com

John Larkin
Guest

Thu Apr 30, 2020 12:45 am   



On Wed, 29 Apr 2020 15:39:38 -0700 (PDT), bulegoge_at_columbus.rr.com
wrote:

>Presumably it has high input resistance so you can RC filter the heck out of it

The VCO? No, it will be inside a fast PLL.

--

John Larkin Highland Technology, Inc
picosecond timing precision measurement

jlarkin att highlandtechnology dott com
http://www.highlandtechnology.com

Phil Allison
Guest

Thu Apr 30, 2020 12:45 am   



John Larkin wrote:

------------------
Quote:

I was looking for a fairly steady input to my VCO, to check frequency
stability, and remembered my old 10 volt REF-01 box. It's powered by a
14 volt wall-wart. I built and tweaked it about 10 years ago.

https://www.dropbox.com/s/6h6wrorcfjuvgev/REF-01_box.jpg?raw=1

https://www.dropbox.com/s/vrmh3il9ru9lvxm/REF-01_volts.jpg?raw=1



** I've been using a Nat Semi LH0070-1H for about 30 years to check and calibrate my various DMMs.

https://pdf1.alldatasheet.net/datasheet-pdf/view/99070/NSC/LH0070-1H.html

The 10V reference is fed from a 15V regualtor - both in TO5 pak.

The ten volt output is divided down by a string of 0.1% precision resistors to get accurate 1V and 100mV references.



..... Phil

George Herold
Guest

Thu Apr 30, 2020 12:45 am   



On Wednesday, April 29, 2020 at 6:39:43 PM UTC-4, bule...@columbus.rr.com wrote:
> Presumably it has high input resistance so you can RC filter the heck out of it

Is that to me or JL?
The current source has a fet-opamp follower in the loop.
Feeding the common of the REF01.
(From AoE2 end of the chapter circuit ideas.)

GH

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