A power factor correction circuit for a boost-type voltage converter determines the input voltage by sensing the rate at which the current through an inductor changes when a switching transistor is turned on. The circuit includes a current sense circuit which generates a control signal in response...http://www.google.fr/patents/US5764039?utm_source=gb-gplus-shareBrevet US5764039 - Power factor correction circuit having indirect input voltage sensing
Power factor correction circuit having indirect input voltage sensing
