> When a quartz watch or clock is assembled, what method is used to get it as > accurate as possible?
Bob, First generation quartz watches had a tiny F/S (fast/slow) trimmer capacitor. These days it's done with skip cycles and one-time factory calibration. Think leap days or leap seconds -- it's easier and more reliable than changing the frequency of the oscillator itself. It's also one less part, easier to calibrate, and unlike active and passive components, math has no environmental sensitivity. Have a quick read of 32 kHz watch IC's like: http://www.nxp.com/documents/data_sheet/PCA2000_2001.pdf /tvb _______________________________________________ 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.
