Patent ID: 6518831
Filing Date: 2003-02-11
Classification: H02M

Abstract:
A boosting circuit for a high voltage operation in a semiconductor memory device, comprising:a VPP pump unit for boosting a power voltage, and generating a first voltage, and a second voltage wherein the second voltage is higher than, the first voltage; a first VPP level detecting unit for comparing the first voltage from the VPP pump unit with a first reference voltage level in response to an operation control signal and outputting a resulting signal; a second VPP level detecting unit for comparing the second voltage with a second, reference voltage in response to the operation control signal and outputting a resulting signal; a VPP control circuit unit for receiving the output signal from the first VPP level detecting unit, the output signal from the second VPP level detecting unit and the operation control signal, and generating a. signal for controlling the VPP pumping operation; and a ring oscillator unit for performing an oscillation operation according to the output signal from the VPP control circuit unit, and generating a pulse signal having a predetermined period for controlling operation of the VPP pump unit.