XPost: alt.engineering.electrical, sci.electronics.design, sci.e   
   ectronics.repair   
   From: invalid@invalid.net   
      
   > More useful to let it oscillate as a square wave generator at 100kHz   
   > or so, and rectify the output into a negative 15V rail. That way you   
   > can run the op amps the way they are meant to be run.   
   >   
   > d   
      
   Suggest a circuit...?   
      
   Thanks.   
      
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