Patent ID: 8644039
Filing Date: 2014-02-04
Classification: H02M

Abstract:
1. A voltage multiplying circuit, comprising: a first capacitor, comprising a first terminal and a second terminal, wherein the first terminal of the first capacitor is selectively coupled to a first voltage or a second voltage, and the second terminal of the first capacitor is selectively coupled to the first voltage or a fourth voltage, wherein the second voltage is from a first constant voltage source permanently providing the second voltage; a second capacitor, comprising a first terminal and a second terminal, wherein the first terminal of the second capacitor is selectively coupled to the second voltage or the fourth voltage, and the second terminal of the second capacitor is selectively coupled to a third voltage or the fourth voltage, wherein the third voltage is from a second constant voltage source permanently providing third voltage; and a third capacitor, comprising a first terminal and a second terminal, wherein the first terminal of the third capacitor is selectively coupled to the second voltage or the fourth voltage, and the second terminal of the third capacitor is selectively coupled to a third voltage or the fourth voltage, wherein the first terminal of the third capacitor is coupled to the fourth voltage and the second terminal of the third capacitor is coupled to the third voltage in one mode, where the first terminal of the third capacitor is coupled to the second voltage and the second terminal of the third capacitor is coupled to the fourth voltage in another mode.