Patent ID: 6784723
Filing Date: 2004-08-31
Classification: H02M

Abstract:
A high-voltage generation circuit, comprising:a high-voltage level detection means for detecting a level of high voltage and for generating a detected signal; a high-voltage pump control means for generating a control signal, responsive to the detected signal of the high-voltage level detection means; a plurality of high-voltage pumps; an oscillator, responsive to the control signal, for generating a pulse signal to activate the plurality of high-voltage pumps; and a sequential delay means having a multiplicity of delay elements for sequentially delaying the pulse signal from the oscillator, where each of the multiplicity of delay elements provides a delayed pulse signal, wherein the plurality of high-voltage pumps are configured to provide a high voltage under the control of the delayed pulse signal and the control signal from the high-voltage level detection means; wherein each pump in the plurality of high-voltage pumps includes: a first transmission gate, responsive to the control signal; a second transmission gate, responsive to the control signal, wherein the first and the second transmission gate are configured to selectively transmit an inverted signal for the sequentially delayed pulse signal by the sequential delay means; a first latch configured to latch signals fed thereto from the transmission gate; second latch configured to latch signals fed thereto from the second transmission gate; a first logic gate; a second logic gate, wherein the first logic gate performs a logic operation on an inverted signal for a latched signal by the first latch and the output processed at the second latch and the second logic gate, and the second logic gate performs a logic operation on the output of the second latch and an inverted signal for the output of the first logic gate; and a pumping means for pumping high voltage based on the outputs of first and second logic gates.