Patent ID: 6762639
Filing Date: 2004-07-13
Classification: H02M,Y02B

Abstract:
A booster circuit having a power-supply node supplied with a power-supply voltage, a ground node supplied with a ground voltage, a booster node for generating a boosted level, first and second input nodes, and first and second intermediate nodes, said booster circuit comprising a first pump capacitor connected between said first input node and said first intermediate node and a second pump capacitor connected between said second input node and said second intermediate node, said booster circuit comprising:a first switch having a first fixed contact fixedly connected to said first input node and a first moving contact which is selectively connected to one of said power-supply node, said ground node, and said booster node; a second switch having a second fixed contact fixedly connected to said second input node and a second moving contact which is selectively connected to one of said power-supply node, said ground node, and said booster node; a third switch having a third fixed contact and a third moving contact disposed between said first and said second intermediate nodes, said third switch making or breaking between said first and said second intermediate nodes; a fourth switch having a fourth fixed contact fixedly connected to said first intermediate node and a fourth moving contact which is selectively connected to one of said power-supply node, said booster node, and a non-connective node connected to nowhere; a fifth switch having a fifth fixed contact fixedly connected to said second intermediate node and fifth moving contact which is selectively connected to one of said power-supply node, said booster node, and said non-connective node.