Patent ID: 9013230
Filing Date: 2015-04-21
Classification: H02M

Abstract:
1. A charge pump circuit, comprising a charge pump, a regulator circuit, and a load current, wherein the charge pump circuit further comprises: a filter circuit connected to an output terminal of the charge pump for filtering an output voltage of the charge pump; and a ripple control circuit connected both to the output terminal of the charge pump and to the filter circuit for reducing the output voltage of the charge pump upon an increase thereof, thereby attenuating ripples contained in the output voltage of the charge pump; wherein the filter circuit includes a capacitor, a first NMOS and a resistor, the first NMOS including a first gate, a first drain and a first source, the capacitor having one end connected to the output terminal of the charge pump and the other end connected to the first drain, the first gate and the first drain being interconnected to each other and both connected to the ripple control circuit, the first source connected to ground via the resistor.