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Dave's Circuits
Circuits designed by David Johnson, P.E.

Master Category List - Dave's Circuits
Last Updated on: Monday, April 21, 2008 04:18 AM


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 Drawing Below to view PDF version of Schematic

Low Power Gated Crystal Oscillator designed by David Johnson, P.E. (June 3, 2000)

Charge Pump Circuits    Crystal Oscillators
Master Schematic Category List - David A. Johnson, P.E.
 

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