A crystal oscillator is an electronic oscillator circuit that uses the mechanical resonance of a vibrating crystal of piezoelectric material to create an electrical signal with a constant frequency. This frequency is often used to keep track of time, as in quartz wristwatches, to provide a stable clock signal for digital integrated circuits, and to stabilize frequencies for radio transmitters ...Xi Jinping 习近平 Xi in May 2019 General Secretary of the Chinese Communist Party Incumbent Assumed office 15 November 2012 Preceded by Hu Jintao President of the …Children Xi Mingze (daughter)Political party Communist Party of ChinaEducation Tsinghua University (BE, LLD)President Hu Jintao
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