Patent ID: 7847620
Filing Date: 2010-12-07
Classification: G11C,H02M

Abstract:
1. A charge pumping circuit, comprising: a voltage sensor detecting a level of a voltage and outputting a control signal corresponding to the detection result; an oscillator providing an oscillating clock signal in response to the control signal and sequentially outputting the clock signal as a plurality of clock signals, wherein the phase of each clock signal is shifted with respect to each other; and a plurality of voltage pumps disposed in a plurality of regions to pump the voltage, wherein each region has corresponding voltage pumps for pumping the voltage, and for each region the pumps of the region pump the voltage and provide the pumped voltage as a supply voltage for operation of the region independently of the other regions, so as to have a plurality of the separately provided supply voltages for the plurality of regions, wherein the corresponding voltage pumps of each region operate in response to a corresponding one of the clock signals, such that each region is designated a different phase and operation beginning points, each being the point at which pumping of the voltage of the corresponding region begins, of the regions do not begin simultaneously, and wherein a pair of the voltage pumps are disposed in each region, and only one of the voltage pumps included in the pair receives the corresponding clock signal via a latch while the other of the pair receives the corresponding clock signal as a non-inverted clock signal.