Patent ID: 9680373
Date: 2017-06-13
CPC Classifications: H02M

Claim:
1. A charge pump circuit comprising: a pump capacitor whose one end is connected with a source power supply side via a first reverse-current prevention element so that a charging current is supplied thereto and whose other end is connected with two kinds of voltage sources via switches; and an output capacitor whose one end is connected with a high-potential terminal of the pump capacitor via a second reverse-current prevention element so that a charging current from the pump capacitor is supplied thereto via the second reverse-current prevention element and whose other end is connected with the source power supply, wherein a filter circuit configured with a resistor and a capacitor is provided between the source power supply and the first reverse-current prevention element, and the connection point of the resistor and the capacitor of the filter circuit and one end of the first reverse-current prevention element are connected with each other.