使用60赫兹电力线路频率作为一个精确的实时时钟Timebase

Using 60Hz Power Line Frequency as an Accurate Real Time Clock Timebase

Using 60Hz Power Line Frequency as an
Accurate Real Time Clock Timebase
Application Note August 3, 2007 AN1342.0



Introduction Circuit Description (See Figure 2)
Real Time Clock (RTC) devices contain an oscillator and Input Clock Conversion
normally require a crystal to operate with the required This application circuit uses a wall transformer for the AC
accuracy. Crystal oscillators are a good solution in that they