Patent ID: 6356137
Filing Date: 2002-03-12
Classification: G11C,H02M

Abstract:
A high voltage generating circuit having an input that receives an input signal and an output that provides a final boosted output signal, the high voltage generating circuit comprising:a first voltage boosting circuit operable to generate a first boosted output signal in response to the input signal; a second voltage boosting circuit operable to generate a second boosted output signal in response to the input signal; and a summing circuit coupled to said first and second voltage boosting circuits configured to add voltage levels of said first boosted output signal and said second boosted output signal to generate the final boosted output signal, wherein the first voltage boosting circuit comprises: a first pull-down transistor coupled between an output of the first voltage boosting circuit and a low potential and having an input coupled to the input of the high voltage generating circuit; a first charge transfer transistor coupled between a first precharge node of the first voltage boosting circuit and the output of the first voltage boosting circuit and having an input coupled to the input of the high voltage generating circuit; a first precharge transistor coupled between a power supply and the first precharge node and having an input coupled to the output of the first voltage boosting circuit; a first capacitive element having a first terminal coupled to the first precharge node; and a first inverter having an input coupled to the input of the high voltage generating circuit and an output coupled to a second terminal of the first capacitive element.