Voltage Control in Memory Devices
AssigneeYangtze Memory Technologies Co., Ltd.
InventorsYiqun CEN, Li XIANG, Ruxin WEI
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Abstract
Example memory devices, circuits, and methods for voltage control in memory devices are disclosed. One example method includes adjusting a rate of change of a reference voltage based on a step voltage and a step time duration, where adjusting the rate of change of the reference voltage includes changing the reference voltage by the step voltage over a time period that equals the step time duration. An output voltage from one or more charge pumps is generated using the reference voltage, where a ratio between the output voltage and the reference voltage is locked.
Claims20
A circuit, comprising:
- one or more charge pumps;
- and
- a reference voltage generation circuit, wherein the reference voltage generation circuit comprises an adder configured to adjust a rate of change of an output voltage of the one or more charge pumps, wherein inputs of the adder comprise a step size and a step frequency, and wherein an output of the adder changes by the step size over a time period that equals an inverse of the step frequency to adjust the rate of change of the output voltage.
A method, comprising:
- adjusting a rate of change of a reference voltage based on a step voltage and a step time duration, wherein adjusting the rate of change of the reference voltage comprises changing the reference voltage by the step voltage over a time period that equals the step time duration;
- and
- generating an output voltage from one or more charge pumps using the reference voltage, wherein a ratio between the output voltage and the reference voltage is locked.
A memory device, comprising:
- a memory cell array comprising memory cells;
- and
- a circuit, comprising:
- one or more charge pumps operable to provide an output voltage to a word line coupled to one of the memory cells of the memory cell array;
- and
- a reference voltage generation circuit, wherein the reference voltage generation circuit comprises an adder configured to adjust a rate of change of an output voltage of the one or more charge pumps, wherein inputs of the adder comprise a step size and a step frequency, and wherein an output of the adder changes by the step size over a time period that equals an inverse of the step frequency to adjust the rate of change of the output voltage.
Dependencies are inferred from the claim text.