Practise your 2 times tables with this quiz. The 5 times table Learn all about the 5 times table and find out about multiples of 5. The 10 times table Discover the 10 times tables and try this quiz.

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Abstract: Crystal oscillators (XO) are widely used in electronic systems, providing low-jitter and temperature-stable reference clock signals. The inherent frequency accuracy of XO is good of ± 10ppm ...