[time-nuts] VC-OCXO EFC stability.

[ct1dmk]

Thank you all for the input.
since I have 12v (or 15v) available
I will try the LT1027... looks promising, the so8
version with typ 2ppm/C... (or why not the can
version for 1ppm/C)

Application is OCXO reference for mmWave gear... I just
want the resulting 100's of GHz not to drift because of the
EFC volt. change as the ambient temperature changes :-(
Have a bunch of sources of freq. drift... At least this one
I think I can get rid off, to some extent.

Tks. Will report later.

Luis Cupido.
ct1dmk


On 1/7/2015 3:28 AM, Bruce Griffiths wrote:
> 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.
>>>
>>>
>>> _______________________________________________
>>> time-nuts mailing list -- time-nuts at febo.com
>>> To unsubscribe, go to
>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the
>>> instructions there.
>>>
>>>
>>>
>>> _______________________________________________
>>> time-nuts mailing list -- time-nuts at febo.com
>>> To unsubscribe, go to
>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the
>>> instructions there.
>>
>> _______________________________________________
>> time-nuts mailing list -- time-nuts at febo.com
>> To unsubscribe, go to
>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the
>> instructions there.
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>