Patent ID: 6538930
Filing Date: 2003-03-25
Classification: G11C

Abstract:
A charge pump circuit comprising:a first power supply node for receiving a first power supply potential; a first reverse current prevention means connected between the first power supply node and a first internal node; a first output node, connected to said first internal node, for outputting a first output potential; a second power supply node for receiving a second power supply potential lower than said first power supply potential; a second reverse current prevention means connected between the second power supply node and a second internal node; a second output node, connected to said second internal node, for outputting a second output potential; and power supply generation means, connected between said first internal node and said second internal node, for enhancing the potential of said second internal node as compared to that of said first internal node, wherein said power supply generation means is formed on or within a semiconductor substrate, and includes a diode element provided so as to flow a current from said first internal node to said second internal node, and a capacitor having one electrode connected to said first and second nodes, and the other electrode provided with a clock signal.