[time-nuts] GPSDO using 100Hz
Tim Shoppa
shoppa at trailing-edge.com
Tue Nov 25 01:31:22 UTC 2008
Bruce wrote:
> Analog time constants of several hours are generally considered
> impractical due to the lack of suitable low noise components
> principally high value resistors and capacitors.
> So how do you propose to get around this with an analog control loop?
Not too many years ago, high-impedance op-amps and teflon capacitors
were the way to do this.
The op-amp companies had application notes discussing "soakage"/dielectric
absorption in these circuits.
Tim.
More information about the time-nuts
mailing list