Patent ID: 6717829
Filing Date: 2004-04-06
Classification: H02M

Abstract:
A charge pump circuit providing a boosted output voltage from an input DC voltage and comprising:a first capacitor to which the input voltage is periodically applied for a determined first time by means of first switch elements of a first switch module, and a second capacitor to which the charge from the first capacitor is periodically transmitted by means of second switch elements of a second switch module which are switched on for a determined second time which is included between two successive first determined times, said second capacitor having a first terminal connected to an input terminal receiving the input voltage and a second terminal connected and, on the other side, to an output terminal providing the boosted output voltage said circuit comprising a control device including a common control means for controlling the charge transmitted to the first capacitor during said first times according to a determined reference voltage and the charge transmitted from the first capacitor to the second capacitor during said second times according to the boosted output voltage obtained at the output terminal, wherein said common control means is a device having a control electrode linked by a switch element of the first switch module to a terminal providing said reference voltage and by a switch element of the second switch module to the output terminal.