The basic criterion are:
- used with a VLSI inverter based oscillator with
3.3 V supply, but somewhat high impedance output.
An inverter is not specified for oscillator duty.
It cannot be analyzed for this application on SPICE.
It will never be a high precision oscillator circuit.
(10
Given that HP's engineers have done such a good job with
the oven and oscillator design, is there anything to be gained
by adding extra thermal insulation (lagging)? How much
Not a good idea. The best thing you could do to improve
temp stability of a 10811 is to tweak the resistors that
It specifically
addresses the gain/bandwidth zerocrossing detector issues.
Peter ZL2AYX
Also see John Dick's 1990 PTTI paper on JPL zero crossing detectors.
Excellent.
Rick Karlquist
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It has nothing to do with throwing off atoms. A Xtal is actually a
This only happens in very low quality crystals that have impurities on
the surface.
Going in the other direction, the mechanical resonant frequency
changes with time because, as the xtal vibrates, microscopic cracks
I can imagine that the sine wave must be squared off
using a fast comparator and then fed through to a logic
driver. Are there any integrated IC's out there that does
this? It would be rather sad to sustain substantial phase
noise degradation due to a floating comparator threshold
http://www.icst.com/datasheets/ics2305.pdf
ICS has many interesting clock chips which can be used for other
uses than what they were designed. Worth a browse.
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
This chip has 200 ps of jitter! There is no way you would
want to
Never has Symmetricom or any other CBT manufacturer made CBTs for HP or
Agilent. HP/Agilent always made
their own.
I thought the CBT's were originally made by Varian for HP.
That's why the CBT burn in fixtures (still in use today AFAIK)
are marked Varian Associates. In any event, the 5071
, but it looks like a list of
numbers folllows this, and not the letter A I'm converned this is
perhaps a special, at an odd freqency, and not the standard 10MHz
10811A. Is there any where it actually says 10811A on the
package? Can you give me a price to ship to the UK. Address would
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Behalf Of Chuck Harris
Sent: Wednesday, April 20, 2005 8:14 PM
To: [EMAIL PROTECTED]; Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] connections for HP 10811A ?
I imagine that
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