Patent ID: 8369115
Filing Date: 2013-02-05
Classification: H02M

Abstract:
1. A voltage conversion circuit comprising: an oscillating circuit for generating a clock signal; a capacitor based charge pump circuit for receiving the clock signal and an input voltage signal having an input current and for generating an output voltage signal, less than the input voltage signal and an output current greater than the input current; a comparator circuit for receiving a version of the output voltage signal, as a first input signal thereto, and a reference voltage signal as a second input signal thereto and for comparing the first input signal to the second input signal and for generating a control signal in response thereto; wherein the control signal is supplied to the oscillating circuit for controlling the generating of the clock signal; and wherein said charge pump circuit comprises: a capacitor, having a first end and a second end, wherein said second end provides the output voltage signal; a switch connected to the first end for connecting the first end to the input voltage signal, activated by a first clock signal, and for connecting the first end to ground activated by a second clock signal.