Memory device and control method thereof
AssigneeWinbond Electronics Corp.
InventorChung-Meng Huang
Life of this patent
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Abstract
A memory device includes a memory array and a frequency-to-voltage converter. The memory array includes a plurality of memory cells arranged in rows and columns, and gates of the memory cells in the same row are coupled to each other and connected to a word line. The frequency-to-voltage converter coupled between the word line and a clock signal source outside the memory device receives a clock signal, and correspondingly outputs different voltages to the word line in accordance with the frequency of the clock signal.
Claims13
A memory device, comprising:
- a memory array, having a plurality of memory cells arranged in rows and columns;
- wherein gates of the memory cells in the same row are coupled to each other and connected to a word line;
- a frequency-to-voltage converter, coupled between the word line and a clock signal source outside the memory device, receiving a clock signal and correspondingly outputting different voltages to the word line in accordance with a frequency of the clock signal;
- wherein the frequency-to-voltage converter comprises a frequency detector, the frequency detector receives the clock signal, determines a frequency segment that the clock signal belongs to by comparing the frequency of the clock signal with predetermined frequencies, and outputs a frequency discrimination result in accordance with the frequency segment.
A memory device control method, wherein the memory device comprises a memory array and a frequency-to-voltage converter, the memory array has a plurality of memory cells arranged in rows and columns, and gates of the memory cells in the same row are coupled to each other and connected to a word line;
- the frequency-to-voltage converter is coupled between the word line and a clock signal source outside the memory device;
- the control method comprising:
- providing a clock signal by the clock signal source outside the memory source;
- reading data stored in the plurality of memory cells by the memory device;
- receiving the clock signal by the frequency-to-voltage converter, and correspondingly outputting different voltages to the word line by the frequency-to-voltage converter in accordance with the frequency of the clock signal;
- wherein the frequency-to-voltage converter comprises a frequency detector, the frequency detector receives the clock signal, determines a frequency segment that the clock signal belongs to by comparing the frequency of the clock signal with predetermined frequencies, and outputs a frequency discrimination result in accordance with the frequency segment.
Dependencies are inferred from the claim text.