From: pchung705@gmail.com   
      
   Power factor correction circuits are essential part of modern household power   
   supplies. These circuit have a feature of behaving almost as a pure resistive   
   load to the power network, and obtaining DC with sine ripple on the output.   
   Read more.   
      
   http://www.cirvirlab.com/index.php/switching-mode-power-supply/1   
   4-pfc-power-factor-corrector-circuit.html   
      
   --- SoupGate-Win32 v1.05   
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