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US 8,138,821 B2Granted
High voltage pumping circuit
AssigneeHynix Semiconductor Inc.
InventorYou Sung Kim
Life of this patent
Estimating the term…
Abstract
A swing width control circuit and a high voltage pumping circuit using the same are disclosed. The swing width control circuit includes a swing width controller for receiving a first pumping signal having a first swing width and generating a second pumping signal having a second swing width larger than the first swing width of the first pumping signal, in accordance with a level of a supply voltage to pump or precharge a voltage of a specific node, and a swing width holding device for maintaining a swing width of the specific node to be equal to the second swing width of the second pumping signal.
Claims16
A high voltage pumping circuit comprising:
- a first pumping circuit including a precharge circuit configured to precharge a first node, a first swing width controller configured to receive a first inputted pumping signal having a first swing width and output a first pumping signal having a second swing width for pumping of a voltage of the first node when a supply voltage is lower than a predetermined reference voltage, and a first swing width holding device configured to maintain a swing width of the first node to be equal to that of the first pumping signal from the first swing width controller;
- a second pumping circuit including a first precharge device configured to precharge a second node in response to a signal from the first node, a second swing width controller configured to receive a second inputted pumping signal having the first swing width and output a second pumping signal having the second swing width for pumping of a voltage of the second node when the supply voltage is lower that the predetermined reference voltage, and a second swing width holding device configured to maintain a swing width of the second node to be equal to that of the second pumping signal from the second swing width controller;
- and
- a first transfer device configured to transfer the voltage of the second node in response to a first transfer control signal which is distinct from a signal at the second node,
- wherein the second swing width is larger than the first swing width.
2 more elements
A high voltage pumping circuit comprising:
- a first pumping circuit including a precharge circuit configured to precharge a first node, a first swing width controller configured to receive a first inputted pumping signal having a first swing width and output a first pumping signal having a second swing width for pumping of a voltage of the first node, and a first swing width holding device configured to maintain a swing width of the first node to be equal to that of the first from the first swing width controller;
- a second pumping circuit including a first precharge device configured to precharge a second node in response to a signal from the first node, a second swing width controller configured to receive a second inputted pumping signal having the first swing width and output a second pumping signal having the second swing width for pumping of a voltage of the second node, and a second swing width holding device configured to maintain a swing width of the second node to be equal to that of the second pumping signal from the second swing width controller;
- a first transfer device configured to transfer the voltage of the second node in response to a first transfer control signal which is distinct from a signal at the second node,
- wherein the second swing width is larger than the first swing width, in accordance with a level of a supply voltage;
- a third pumping circuit including a second precharge device configured to precharge a third node in response to the signal from the first node, a third swing width controller configured to receive a third inputted pumping signal having the first swing width and output a third pumping signal having the second swing width for pumping of a voltage of the third node, and a third swing width holding device configured to maintain a swing width of the third node to be equal to that of the pumping signal from the third swing width controller;
- and
- a first control signal generator including a third precharge device configured to precharge a fourth node in response to the signal from the first node, a first swing width changer configured to change a swing width of a signal from the third node, and a fourth swing width holding device configured to maintain a swing width of the fourth node to be equal to that of an output signal from the first swing width changer to generate the first transfer control signal.
4 more elements
Dependencies are inferred from the claim text.