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More  Astable Oscillators Circuits   
Square Wave Oscillators

MICROPOWER C-MOS OSCILLATOR, DRAWS ONLY 0.5uA
 

If truly low power oscillators interest you, this circuit draws a mere 2 microwatts (500nA) from a 6v battery. It uses a very inexpensive C-MOS IC to produce a frequency of 2Hz. However, by changing the component values you can push it to 300Hz. The circuit draws much less current than traditional C-MOS oscillators using a Schmitt trigger inverter. It also produces fast leading edges. However, if you need more drive current, a C-MOS buffer should be included. Published in EDN, September 2, 1993.

Click on Drawing Below to view PDF version of Schematic

Circuit Micro Power Oscillator designed by David A. Johnson, P.E.  (June 3, 2000)

More  Astable Oscillators Circuits   
Square Wave Oscillators

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