Charge pump circuit
AssigneeElite Semiconductor Memory Technology Inc.
InventorsChung-Zen Chen, Chung-Shan Kuo, Yang-Chieh Lin
Life of this patent
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Abstract
A charge pump circuit including a plurality of controlled charge pumps (CPs), a plurality of uncontrolled CPs, a plurality of control units, and an output unit is provided. Each controlled CP determines whether to provide charges to a node by a control signal, and each uncontrolled CP constantly provides charges to the node. The higher the node voltage at the node is, the more the controlled CPs not providing charge to the node are, so as to suppress the voltage of the node. In addition, the output unit regulates and outputs an output voltage according to the node voltage by the negative feedback.
Claims7
A charge pump circuit, comprising:
- a plurality of controlled charge pumps, determining whether to provide charges to a node by a plurality of control signals;
- a plurality of uncontrolled charge pumps, respectively providing charges to the node constantly;
- a plurality of control units, coupled to the node, detecting a node voltage at the node, respectively outputting the control signals according to the node voltage;
- an output unit, coupled to the node, outputting an output voltage to an output node according to the node voltage;
- and
- a feedback unit, having an input terminal for receiving the output voltage and an output terminal for sending out the output voltage regulated through negative feedback;
- wherein the higher the node voltage is, the more the controlled charge pumps controlled by the control signals not providing charges to the node are.
A semiconductor memory device, comprising a charge pump circuit having:
- a plurality of controlled charge pumps, determining whether to provide charges to a node by a plurality of control signals;
- a plurality of uncontrolled charge pumps, respectively providing charges to the node constantly;
- a plurality of control units, coupled to the node, detecting a node voltage at the node, respectively outputting the control signals according to the node voltage;
- an output unit, coupled to the node, outputting an output voltage to an output node according to the node voltage;
- and
- a feedback unit, having an input terminal for receiving the output voltage and an output terminal for sending out the output voltage regulated through negative feedback;
- wherein the higher the node voltage is, the more the controlled charge pumps controlled by the control signals not providing chargers to the node are.
Dependencies are inferred from the claim text.