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US20080310201 Digital Power Factor Correction  
A digital PFC (DPFC) control approach that requires no input voltage sensing or current loop compensation is described. The approach can provide stable, low-harmonic operation over a universal...
US20080123379 Voltage Regulating Circuit  
A voltage regulating circuit comprising a rectifier ( 2 ) for receiving an AC voltage (V mains ) and for generating a rectified AC voltage (v rec ), and a capacitor ( 3 ) connected in parallel with...
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