Bruce Griffiths wrote:
Garry Thorp wrote:
With the 723, you can make the reference noise as low as you want, by
heavy RC filtering. This applies whether you use its own reference or a
better external reference.
The 723 also seems to work quite happily with a feedback capacitor from
the output
Magnus Danielson wrote:
Bruce Griffiths wrote:
Garry Thorp wrote:
With the 723, you can make the reference noise as low as you want, by
heavy RC filtering. This applies whether you use its own reference or a
better external reference.
The 723 also seems to work quite happily with a feedback
With the 723, you can make the reference noise as low as you want, by
heavy RC filtering. This applies whether you use its own reference or a
better external reference.
The 723 also seems to work quite happily with a feedback capacitor from
the output to the inverting input, reducing the AC gain
Garry Thorp wrote:
With the 723, you can make the reference noise as low as you want, by
heavy RC filtering. This applies whether you use its own reference or a
better external reference.
The 723 also seems to work quite happily with a feedback capacitor from
the output to the inverting input,
Garry wrote:
With the 723, you can make the reference noise as low as you want, by
heavy RC filtering. This applies whether you use its own reference or a
better external reference.
The 723 also seems to work quite happily with a feedback capacitor from
the output to the inverting input,
Hi,
I remember a reference, probably by Bruce, that LEDS provide a low
noise voltage reference.
I am proposing to build a voltage regulator for a thermally
controlled LPRO rubidium oscillator,
with the voltage regulator being mounted on the 0.5 inch thick
aluminium heat sink plate.
The LEDS
Quoth Neville Michie at 2010-02-25 08:27...
...the LM317 output
would provide a low noise power source? What would be better?
Can't give you a proper answer, but the last time I saw this type of
question raised, someone pointed me to a linear regulator made from
discrete components, designed
Hi neville:
My old Gibbs rack mount 5 MHz standard used the LM723 linear regulator.
I believe it's one of the lowest noise regulators you can use.
http://www.national.com/mpf/LM/LM723.html#Overview
Have Fun,
Brooke Clarke
http://www.PRC68.com
Neville Michie wrote:
Hi,
I remember a
In message 4b85a2eb.4000...@pacific.net, Brooke Clarke writes:
My old Gibbs rack mount 5 MHz standard used the LM723 linear regulator.
I believe it's one of the lowest noise regulators you can use.
http://www.national.com/mpf/LM/LM723.html#Overview
If you really want to get low noise, you do
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] Low noise voltage regulators
Hi,
I remember a reference, probably by Bruce, that LEDS provide a low
noise voltage reference.
I am proposing to build a voltage regulator for a thermally
controlled LPRO rubidium oscillator
Hi,
NS gives some informations about improvements in their AN-173.pdf
http://www.national.com/ds.cgi/LM/LM117.pdf
Audio freaks are discussing it in
http://www.diyaudio.com/forums/solid-state/28978-improving-lm3x7-regulator-circuit.html
Is that what you are looking for?
73
Arnold
On Thu, 25 Feb
: Wednesday, February 24, 2010 4:57 PM
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] Low noise voltage regulators
Hi,
I remember a reference, probably by Bruce, that LEDS provide a low
noise voltage reference.
I am proposing to build a voltage regulator for a thermally
: Thu, 25 Feb 2010 11:22:02
To: Discussion of precise time and frequency measurementtime-nuts@febo.com
Subject: Re: [time-nuts] Low noise voltage regulators
You can improve the performance of the LM723 if one substitutes an LM329
for the internal reference biased from the regulator output.
The trick
and frequency measurementtime-nuts@febo.com
Subject: Re: [time-nuts] Low noise voltage regulators
You can improve the performance of the LM723 if one substitutes an LM329
for the internal reference biased from the regulator output.
The trick is to use the internal reference for startup and decouple
I meant something like the attached circuit schematic for an LM723 based
15V regulator.
The circuit can be easily extended to use an external pass transistor
where more current is needed.
The LM329 is biased from the regulator output which improves the
reference line rejection.
The 723's
Bruce,
Why not just use a diode in place of the 2M3904 circuit ? Seems like it would
do the same
thing with less parts.
Also, would not the Texas Instruments TL-431 be a better choice as it has a
lower noise spec
them the LM329 part. In addition, with its adjustable nature, the TL-431 would
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