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More  Charge Pump Circuits    Crystal Oscillators

VERY LOW POWER GATED CRYSTAL OSCILLATOR

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 Circuit Below to view PDF of Schematic

June 3, 2000

More  Charge Pump Circuits    Crystal Oscillators

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