This circuit is an OpAmp Oscillator from Patent
4,286,704 Figure Three  using a TI TLC2272 Rail to
Rail OpAmp.
This oscillator circuit is presented in Electronic Workbench 5.12
spice simulator schematic format.  Once you start this simulation
run, it will take the 5.12 spice program about 10 seconds to show
the start of oscillations.
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