Super reg question -- on references

jackinnj · 8th July 2005, 01:40 PM

in an article appearing in the late 1990's a fellow ham radio op used multilple Thaler voltage references (don't worry, you won't be able to find them) to reduce the noise, tempco effects and improve acuracy. The result was a DIY voltage measurement unit which was approaching the acuracy of high end HP, Keithley and Fluke equipment.

how would this affect the "noise" of the Super-Reg if one were to combine multiple references, RC filtering with an ultra-low noise error amp (like the AD797)?

peranders · 10th July 2005, 09:48 PM

Just wondering but how much noise did this super reference produce really? A LM329/LM199 and LTZ1077(?) are all pretty good and a plain LM431 with the normal heavy LP-filter will also be rather low noise-ish.

ADR420 is pretty good also from Analog Devices.
http://www.diyaudio.com/forums/showt...863#post639863

jackinnj · 10th July 2005, 10:01 PM

they have references with 1, 3 and 6uV LF noise -- of course you have to look at the tempco stats etc. . They are available in K and H grades.

8th July 2005, 01:40 PM	#1
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	Super reg question -- on references in an article appearing in the late 1990's a fellow ham radio op used multilple Thaler voltage references (don't worry, you won't be able to find them) to reduce the noise, tempco effects and improve acuracy. The result was a DIY voltage measurement unit which was approaching the acuracy of high end HP, Keithley and Fluke equipment. how would this affect the "noise" of the Super-Reg if one were to combine multiple references, RC filtering with an ultra-low noise error amp (like the AD797)?

10th July 2005, 09:48 PM	#2
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	Just wondering but how much noise did this super reference produce really? A LM329/LM199 and LTZ1077(?) are all pretty good and a plain LM431 with the normal heavy LP-filter will also be rather low noise-ish. ADR420 is pretty good also from Analog Devices. http://www.diyaudio.com/forums/showt...863#post639863 __________________ /Per-Anders (my first name) or P-A as my friends call me

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10th July 2005, 10:01 PM	#3
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	they have references with 1, 3 and 6uV LF noise -- of course you have to look at the tempco stats etc. . They are available in K and H grades.

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