[time-nuts] quartz clock/watch question

Tom Van Baak tvb at LeapSecond.com
Fri Apr 18 23:05:57 UTC 2014

> When a quartz watch or clock is assembled, what method is used to get it as accurate as possible?


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:


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