[time-nuts] OCXO Voltage Input? (Bob Camp)

[Magnus Danielson]

Oh, while we are at it, how about the 10543?

Cheers,
Magnus

On 09/05/2014 03:49 PM, Tom Van Baak (lab) wrote:
> Some OCXO schematics:
> http://leapsecond.com/museum/10544/
> http://leapsecond.com/museum/10811a/
>
> /tvb (i5s)
>
>> On Sep 5, 2014, at 5:50 AM, Dan Kemppainen <dan at irtelemetrics.com> wrote:
>>
>> Hi Bob,
>>
>> Being relatively new to this 'high end' time stuff, there's lots to
>> learn...   So, how much bandwidth might a typical OCXO have on the EFC
>> pin? My assumption is that it is very low, but I have nothing to back
>> that up.
>>
>> If I had 10Mhz or some other high frequency on the EFC line, would a
>> typical OCXO respond to that?
>>
>> The concern is that any HF noise on the power pins of the driving op-amp
>> might make it onto the EFC line. Of course most amps have good PSRR at
>> low frequencies. If the EFC pin only has low frequency response, there
>> shouldn't be an issue.
>>
>> Are there any OCXO schematics out on the web, that one could study?
>>
>> Dan
>>
>>
>>
>>
>>> On 9/5/2014 7:02 AM, time-nuts-request at febo.com wrote:
>>> Hi
>>>
>>> The EFC pin *might* have a bypass cap on it. If you drive it with an op-amp an isolating resistor might be needed. If so, a couple hundred ohms is likely enough to stabilize the op-amp.
>>>
>>> In a closed loop / control loop setting, the noise on the EFC will be whatever the loop generates. As long as you stay with good quality op-amps and low impedances in your filters, things should be plenty quiet.
>>>
>>> Things like EFC range, output frequency, phase noise, and intended use  / circuit would be needed to come up with more specific information.
>>>
>>> Bob
>> _______________________________________________
>> 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.
>