50Hz high-precision time base signal source(CD4060)

Published:2011/5/12 2:24:00 Author:Ecco | Keyword: 50Hz , high-precision , time base, signal source | From:SeekIC

In some of the early production of the digital electronic clocks with AC power supply, the 50Hz AC power frequency is used as a second time base after fractional frequency because of structure. As the frequency of AC power will always has a certain bias, this small deviation will cause the large deviation between the real time and clock over time. In order to eliminate this bias, amateur enthusiasts make a variety of 50Hz high-precision time base circuits. The most using is the circuit composed of CD4060, it is shown as the chart.



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