[time-nuts] VC-OCXO EFC stability.

[Bruce Griffiths]

Luis

If you have sufficient headroom (input supply > 7V or so) why not use a 
buried zener reference chip like an LT1027?
These chips also have a noise reduction pin.
Otherwise a lower dropout bandgap reference like an LT1019 or similar 
may be useful.

Bruce

On Wednesday, January 07, 2015 01:35:59 AM ct1dmk wrote:
> Hi Bob, That is the issue, it doesn't.
> (the 2,3 different types I would like to use none of them have it, so I will
> be making a small pcb with the trimpot and the regulator and some
> capacitors etc).
> 
> Luis Cupido.
> ct1dmk
> 
> On 1/7/2015 1:09 AM, Bob Stewart wrote:
> > Does your oscillator have a VRef output?  If so, use that instead of a
> > regulator.  It's cleaner and usually temperature compensated.
> > 
> > Bob
> > 
> >        From: ct1dmk<ct1dmk at gmail.com>
> >   
> >   To: Discussion of precise time and frequency
> >   measurement<time-nuts at febo.com> Sent: Tuesday, January 6, 2015 
6:40 PM
> >   Subject: [time-nuts] VC-OCXO EFC stability.
> > 
> > Hi,
> > 
> > With a multiturn pot and a 78L05 I can get a 0 to 5V EFC to tune
> > an OCXO on desired freq. But... maybe other voltage regulators
> > or other scheme have better temp stability than the old 78L05.
> > 
> > Before I crawl lost in new'ish fancy regulator land does anybody
> > know the killer solution/IC for this job ?
> > 
> > Luis Cupido
> > ct1dmk.
> > 
> > 
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