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Circuits designed by David Johnson,
P.E.
Last Updated on:
Saturday, December 23, 2017 02:27 PM
Master Category List - Dave's Circuits
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Charge Pump Circuits
Crystal Oscillators |
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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. |
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Click on Drawing Below to view PDF version of Schematic |
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