Pumping circuit
AssigneeHynix Semiconductor Inc.
InventorYoung Joo Kim
Life of this patent
Estimating the term…
Abstract
The present invention relates to a pumping circuit. The pumping circuit comprises a first pumping block for pumping an input voltage, a first latch for latching the output of the first pumping block, a second pumping block for pumping the output of the first pumping block according to a control signal, a second latch for latching the output of the second pumping block, and a switching circuit for selectively outputting the outputs of the first and second latches according to the control signal. Thus, a program voltage and a program verify voltage of different levels are pumped. The ripple and active current can be reduced and the program efficiency can be increased.
Claims9
A pumping circuit, comprising:
- a first pumping block for pumping an input voltage;
- a first latch for latching a first output of the first pumping block;
- a second pumping block for pumping the first output of the first pumping block;
- a second latch for latching a second output of the second pumping block;
- and
- a switching circuit for selectively outputting the outputs of the first and second latches according to the control signal.
A pumping circuit, comprising:
- a first pumping block including a plurality of diodes which are connected in series from each other through the respective connection node and a plurality of capacitors connected to the respective connection node between the diodes, respectively, wherein the plurality of the capacitors are charged according to a plurality of clock signals having opposite phases and pump an input voltage to generate a program verify voltage;
- a first latch for latching the program verify voltage from the first pumping block;
- a second pumping block including a plurality of diodes which are connected in series from each other through the respective connection node and a plurality of capacitors connected to the respective connection node between the diodes, respectively, wherein the plurality of the capacitors are charged according to a plurality of clock signals having opposite phases that are generated by an inverted signal of a program verify signal and pump the output of the first pumping block to generate a program voltage;
- a second latch for latching the program voltage from the second pumping block;
- and
- a switching circuit for selectively outputting the outputs of the first and second latches according to the inverted signal of the program verify signal.
A pumping circuit, comprising:
- first and second clock generators for generating first and second clock signals having opposite phases;
- a third clock generator for logically combining the first clock signal and an inverted signal of a program verify signal to generate a third clock signal;
- a fourth clock generator for logically combining the second clock signal and the inverted signal of the program verify signal to generate a fourth clock signal;
- a plurality of diodes connected between respective nodes between an input node and an output node, for transferring the voltage of a previous node to a next node;
- a plurality of capacitors connected between the plurality of the diodes which are connected in series from each other through the respective connection node, respectively, and charged according to the first through fourth clock signals to raise the voltage of each of the nodes;
- a first latch for latching the voltage of a given node, wherein the node keeps a voltage that is raised to a program verify voltage by the capacitor charged according to the first and second clock signals;
- a second latch for latching the voltage of the output node, wherein that output node keeps a voltage that is raised to a program voltage by the capacitor charged according to the first through fourth clock signals;
- and
- a switching circuit for selectively outputting the voltages latched in the first and second latches according to an inverted signal of the program verify signal.
Dependencies are inferred from the claim text.