Semiconductor integrated circuit device
First Claim
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1. A semiconductor integrated circuit device which operates in synchronism with an external clock, the device comprising:
- a first circuit to generate, from said external clock, an output strobe signal for outputting data from the device, and to output the output strobe signal, said external clock including complementary clock components, wherein receipt of input data, a command and an address are responsive to a cross point where the complementary clock components of said external clock cross a reference voltage.
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Abstract
In a semiconductor integrated circuit device operating in synchronism with a clock supplied from the outside of the device, there is provided a circuit generating, from the clock, an output strobe signal for outputting data from the device and outputting the output strobe signal to the outside of the device.
127 Citations
12 Claims
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1. A semiconductor integrated circuit device which operates in synchronism with an external clock, the device comprising:
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a first circuit to generate, from said external clock, an output strobe signal for outputting data from the device, and to output the output strobe signal, said external clock including complementary clock components, wherein receipt of input data, a command and an address are responsive to a cross point where the complementary clock components of said external clock cross a reference voltage. - View Dependent Claims (2, 3, 4, 5, 6)
the output strobe signal includes complementary components; and
a cross point of the complementary components of the output strobe signal defines a settlement period for output data.
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6. The semiconductor integrated circuit device as claimed in claim 1, further comprising:
a second circuit which buffers the external clock and outputs a buffered clock as a strobe signal for input data.
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7. A semiconductor memory device comprising:
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a memory part;
a clock receiving part to receive external complementary clocks; and
a first circuit to generate, from said external complementary clocks, complementary output strobe signals for outputting data stored in the memory part, and to output the complementary output strobe signals, wherein receipt of input data, a command and an address are responsive to a cross point where said external complementary clocks cross a reference voltage. - View Dependent Claims (8, 9)
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10. A system comprising:
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a controller to output complementary clocks; and
a memory device coupled to the controller, said memory device comprising;
a memory part;
a clock receiving part to receive the complementary clocks; and
a first circuit to generate, from said complementary clocks, complementary output strobe signals for outputting data stored in the memory part, and to output the complementary output strobe signals to the controller, wherein receipt of input data, a command and an address are responsive to a cross point where said complementary clocks cross a reference voltage. - View Dependent Claims (11, 12)
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Specification