An electromagnetic interference reduction circuit incorporated into a pulse width modulator in a power factor corrector circuit, and which serves continuously to vary the operating frequency of the width modulated output of the pulse width modulator so that the fundamental component of said output is...http://www.google.fr/patents/US5459392?utm_source=gb-gplus-shareBrevet US5459392 - Unity power factor power supply which includes an electromagnetic interference reduction circuit
Unity power factor power supply which includes an electromagnetic ...