Patent ID: 6278315
Filing Date: 2001-08-21
Classification: G11C

Abstract:
A high voltage generating circuit, comprising:a charge pump unit for generating a high voltage by pumping or precharging an external source voltage in accordance with externally generated first and second clock signals and first and second high voltage clock signals;a voltage control unit for generating a voltage control signal in accordance with the high voltage output from the charge pump unit and an externally generated enable signal, the voltage control unit controlling the high voltage generated by the charge pump unit to achieve a predetermined voltage and outputting the predetermined voltage to an external memory cell; anda high voltage clock generating unit for level-shifting the first and second clock signals output from an external clock signal generator in accordance with the voltage control signal output from the voltage control unit and the externally generated enable signal, and outputting the first and second high voltage clock signals to the charge pump unit, wherein voltage swings of the first and second high voltage clock signals change as an amplitude of the voltage control signal changes.