Patent ID: 7030684
Filing Date: 2006-04-18
Classification: H03K

Abstract:
1. A high voltage switch circuit of a semiconductor device, comprising: an input unit for outputting a pumping clock signal by logically combining a clock signal and an enable signal; a pumping unit for outputting a pumping voltage by a pumping operation using the pumping clock signal received from the input unit, wherein the pumping unit includes; a first capacitor for increasing an output voltage of the pumping unit in response to the pumping clock signal so that the pumping voltage is outputted; an inverter for inverting the pumping clock signal; a second capacitor for increasing a voltage of a first node in response to an output of the inverter; and a LVN transistor for connecting an output terminal of the pumping unit with the first node according to a voltage level of the first node; a first native transistor connected between the first node and a high power supply terminal and its gate is connected to the output terminal of the pumping unit; a second native transistor connected between the first node and a well on which the LVN transistor is formed and its gate is connected to the output terminal of the pumping unit; and a switch unit for switching a second high voltage according to the pumping voltage.