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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
