Patent ID: 6661218
Filing Date: 2003-12-09
Classification: G01R

Abstract:
A high voltage detector used in an integrated circuit having a high voltage generator for generating a boosted internal voltage, comprising:a reference voltage supplying unit for supplying a reference voltage; a low voltage detecting unit for comparing the reference voltage and an internal voltage and generating a low voltage detecting signal, which is enabled when the internal voltage is less than a predetermined voltage level; and a control signal outputting unit, which is configured as a current mirror and to which the high voltage and the internal voltage are applied, for controlling current flowing through the current mirror in response to the low voltage detecting signal and outputting a pumping control signal having a first or a second potential level; the control signal outputting unit comprises: a first node: a second node; a pass gate unit having a resistance and connected between the first and second nodes, wherein the resistance is varied between the first and second nodes in response to the low voltage detecting signal; and an output voltage generating unit, which is configured as a current mirror and to which the high voltage and the internal voltage are applied, for outputting the pumping control signal of the first or second potential level according to the resistance of the pass gate.