[time-nuts] HP 5065A super

Attila Kinali attila at kinali.ch
Thu Feb 22 10:46:14 EST 2018

On Thu, 22 Feb 2018 15:33:50 +0000
"Poul-Henning Kamp" <phk at phk.freebsd.dk> wrote:

> >Then i would go for the LTC6240HV with a +/-5V power supply.
> Offset voltage (stability) is a, if not the, *very* important
> parameter for the integrator.

That's another reason to choose the LTC6240 over the LT1793.
Beside the smaller 1/f noise (0.55µVpp vs 2.4µVpp), the LTC6240
has a much lower temperature coefficient (0.7µV/°C vs 8µV/°C).

The biggest drawback of the LT6240HV is its limited input range
of -5V to +3V (for a +/-5V supply). But in an integrator application,
this shouldn't be a problem (phase reversal is prevented by the 10k
input resistor). 

			Attila Kinali

It is upon moral qualities that a society is ultimately founded. All 
the prosperity and technological sophistication in the world is of no 
use without that foundation.
                 -- Miss Matheson, The Diamond Age, Neil Stephenson

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