Definitely a must-have if you want to measure your time-dilation on a long
airplane flight, or perhaps when climbing a very tall mountain ?
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Actually even crystal oscillators start to lose time in hours... A rubidium
can holdover for days and a cesium can holdover for more days... None are
perfect. Cesium 133 resonates between different energy states
9,192,631,770 times each second with almost no variation. So a clock that
ticks to
It's really a matter of what you want for a reference. A
Rubidium/Cesium/whatever reference will give you a very stable 10Mhz timing
reference, but it *wont* give you the official time-of-day. Every so often,
there are corrections to official world time and if you're using a stable
timing
Neglecting switching characteristics for a moment, the only 2 parameters
for a free-wheeling diode are (1) it must safely handle the peak inductor
current, and (2) the reverse-breakdown voltage must be greater than the
supply voltage. In operation, it acts as a regular diode to provide a path
