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US 9,071,247 B2Granted
Semiconductor device for performing preemphasis operation
AssigneeSK hynix Inc.
InventorSeong-Hwi Song
Life of this patent
Estimating the term…
Abstract
A semiconductor device includes: a main driving unit configured to receive an output data and to drive the received data to a data output pad; a pre-emphasis data generation unit configured to compare a delayed data obtained by delaying the output data by one data period with the output data, to delay the comparison result by one data period, and to output the delayed data as pre-emphasis data; and a pre-emphasis driving unit configured to receive the pre-emphasis data and to drive the received data to the data output pad.
Claims18
A semiconductor device comprising:
- a main driving unit configured to receive an output data and to drive the received data to a data output pad;
- a pre-emphasis data generation unit configured to compare a delayed data obtained by delaying the output data by one data period with the output data, to delay a comparison result by one data period, and to output a delayed comparison result as pre-emphasis data;
- and
- a pre-emphasis driving unit configured to receive the pre-emphasis data and to drive the received data to the data output pad,
- wherein the pre-emphasis driving unit operates when the data period where the output data maintain same logic level is maintained during two or more data periods.
2 more elements
A semiconductor device comprising:
- a main driving unit configured to drive first to third output data, which are successively applied, to a data output pad;
- and
- a pre-emphasis driving unit configured to drive the data output pad in a drive direction opposite to logic levels of the first and second output data in response to an operation in which the third output data is driven to the data output pad, if the first and second output data have the same logic level.
Dependencies are inferred from the claim text.