Patent ID: 7495501
Filing Date: 2009-02-24
Classification: H02M

Abstract:
1. A semiconductor device having a charge pump circuit, the charge pump circuit comprising: a first transistor; a switch; a first capacitor; a second capacitor; and an inverter, wherein an input side of the inverter and a gate electrode of the first transistor are connected to each other, wherein one electrode of the first transistor is connected to a first potential, wherein an output side of the inverter is connected to the other electrode of the first transistor and one electrode of the switch through the first capacitor, wherein the other electrode of the switch is connected to a second potential through the second capacitor, wherein the switch includes a second transistor, a third transistor, and a fourth transistor, wherein one electrode of the fourth transistor is connected to the second potential, wherein the input side of the inverter, a gate electrode of the third transistor, and a gate electrode of the fourth transistor are connected to each other, wherein one electrode of the third transistor is connected to one electrode of the second transistor, wherein the other electrode of the third transistor is connected to the other electrode of the fourth transistor, wherein the one electrode of the second transistor is connected to the first capacitor and the other electrode of the first transistor, and wherein the other electrode of the second transistor is connected to the second potential through the second capacitor.