2008/11/30 Bruce Griffiths <[EMAIL PROTECTED]>: > Since these devices actually store the reference voltage on an internal > capacitor, it would be interesting/informative to plot the output as a > function of time over several years/decades. > They haven't yet been available for long enough to establish their long > term stability in actual use. > I wonder if one can recharge the internal capacitor should this prove > necessary or if one wanted to adjust the output? > This probably requires access to an internal node. > During manufacture, a servo loop adjusts the output by changing the > voltage on the internal capacitor until the output reaches the voltage > of the external precision reference. > The servo loop is then opened trapping the required charge on the capacitor.
I guess that would require having a suitably accurate measuring instrument with an accurate reference voltage in the first place. 73, Steve -- Steve Rooke - ZL3TUV & G8KVD Omnium finis imminet _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
