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The circuit gates the output of a continuously operating 32KHz crystal oscillator
to the input of a C-MOS buffer when clock pulses are needed. The technique gets
around the problem of a slow starting crystal oscillator by keeping the oscillator
going and switching on a transistor power stage only as needed. The method keeps
the standby power consumption to a very low 1uA when used with a 3v supply.
Click on Drawing Below to view PDF version of Schematic
