Patent ID: 7545685
Filing Date: 2009-06-09
Classification: G11C

Abstract:
1. A high-voltage switch circuit comprising: an enable control circuit to precharge a first node to a given voltage in response to an enable signal; a feedback circuit to supply a feedback voltage to a second node in response to a switch control voltage corresponding to the first voltage; a cross-coupled amplification circuit to boost the feedback voltage, output a amplified voltage to the first node in response to control signals and increase the switch control voltage, wherein the control signals comprises first and second clock signals that are complementary, the cross-coupled amplification circuit comprises: wherein when the first capacitor is charged, a first boosting voltage of the first boosting node is increased by a first voltage level, and when the second capacitor is charged, a second boosting voltage of the second boosting node is increased by a second voltage level, and wherein the amplified voltage corresponds the first or second boosting voltage according to a clock cycle; a high voltage switch that is turned on or off in response to the switch control voltage, the high voltage switch being configured to output a second voltage when the high voltage switch is turned on; and a voltage limiter coupled to the second node, the voltage limiter being configured to reduce the switch control voltage so that the switch control voltage is kept below a given voltage level.