From: john@sugarbit.com   
      
    Kuan Peng writes:   
   > You think the current to be "alternating", I think it to be direct,   
   > although increasing current.   
      
   It is a superposition of a DC component and a triangle wave.  We can   
   ignore the DC component in the steady state.   
   --   
   John Hasler   
   john@sugarbit.com   
   Dancing Horse Hill   
   Elmwood, WI USA   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)