Patent ID: 6700436
Filing Date: 2004-03-02
Classification: H02M

Abstract:
A high voltage generating circuit, comprising:a control signal generating circuit for generating a first control signal in a first time period, and for generating second, third and fourth control signals in second, third and fourth time periods; first, second and third pre-charge circuits for pre-charging first, second and third nodes in response to the first control signal; first and second step-up and charge transferring circuits for stepping up the first and third nodes in response to the second control signal, and for performing a charge sharing operation between the first and second nodes and between the third and a fourth node, respectively; a third step-up and charge transferring circuit for stepping up the second node in response to the third control signal and for performing a charge sharing operation between the second and fourth nodes; a pre-charge and charge supplying circuit for pre-charging the fourth node and for supplying charges to the fourth node; and a fourth step-up and charge transferring circuit for stepping up the fourth node in response to the fourth control signal, and for transferring charges of the fourth node to a high voltage generating terminal.