SEMICONDUCTOR STORAGE DEVICE
First Claim
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1. A semiconductor storage device comprising:
- a memory cell;
a word line and a bit line connected to the memory cell;
a first sense amplifier connected to the bit line;
a dummy memory cell;
a dummy bit line connected to the dummy memory cell;
a second sense amplifier connected to the dummy bit line;
a data line connected to the first sense amplifier;
a third sense amplifier connected to the data line;
a dummy data line connected to the second sense amplifier; and
a logic circuit connected to the dummy data line,wherein an output signal of the logic circuit is an input signal that activates the third sense amplifier.
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Abstract
In a semiconductor storage device, such as a dynamic random access memory (DRAM), in which dynamic data is amplified and read on a bit line, a data line sense amplifier/write buffer connected to a data line of a memory array and a data line sense amplifier control signal generating logic circuit connected to a dummy data line of a dummy memory array are provided. A sense amplifier is activated in accordance with an output signal of the logic circuit.
21 Citations
27 Claims
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1. A semiconductor storage device comprising:
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a memory cell; a word line and a bit line connected to the memory cell; a first sense amplifier connected to the bit line; a dummy memory cell; a dummy bit line connected to the dummy memory cell; a second sense amplifier connected to the dummy bit line; a data line connected to the first sense amplifier; a third sense amplifier connected to the data line; a dummy data line connected to the second sense amplifier; and a logic circuit connected to the dummy data line, wherein an output signal of the logic circuit is an input signal that activates the third sense amplifier. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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15. The semiconductor storage device of clam 1, wherein
the logic circuit has a function of calculating a logical sum of two or more of the dummy data lines.
Specification