US 2010/0250994 A1 · DATA PATTERN DETECTING CIRCUIT AND OUTPUT DRIVER INCLUDING THE SAME

Abstract

Disclosed is an output driver capable of solving problems that occur when outputting the same data successively by using a data pattern detecting circuit. The data pattern detecting circuit includes a first data storage unit configured to receive data of a first line and store the received data until a next data is inputted through the first line, a second data storage unit configured to receive data of a second line and store the received data until a next data is inputted through the second line, and a detection signal output unit configured to activate a pattern detection signal when data stored in the first data storage unit and data stored in the second data storage unit have the same logic level.

Claims18

Dependent claims

A data pattern detecting circuit, comprising:

a first data storage unit configured to receive data of a first line and store the received data until a next data is inputted through the first line;
a second data storage unit configured to receive data of a second line and store the received data until a next data is inputted through the second line;
and
a detection signal output unit configured to activate a pattern detection signal when data stored in the first data storage unit and data stored in the second data storage unit have the same logic level.

1 more element

An output driver, comprising:

a multiplexing unit configured to sequentially output a rising data and a falling data that are inputted in synchronization with a rising clock and a falling clock, respectively;
a data pattern detection unit configured to store the rising data and the falling data for a predetermined time, and to activate a pattern detection signal when the stored rising and falling data have the same logic level;
a first driving unit configured to drive a pre-data in response to an output data of the multiplexing unit;
a second driving unit configured to drive the pre-data in response to the output data of the multiplexing unit and the pattern detection signal;
and
a main driving unit configured to output data to the outside of a semiconductor device in response to the pre-data.

3 more elements

An output driver, comprising:

a multiplexing unit configured to sequentially output a rising data and a falling data that are inputted in synchronization with a rising clock and a falling clock, respectively;
a data pattern detection unit configured to store the rising data and the falling data for a predetermined time, and to activate a pattern detection signal when the stored rising and falling data have the same logic level;
a pre-driving unit configured to drive a pre-data in response to an output data of the multiplexing unit;
a first main driving unit configured to drive a data output pad in response to the pre-data;
and
a second main driving unit configured to drive the data output pad in response to the pre-data and the pattern detection signal.

3 more elements

Dependencies are inferred from the claim text.

Data pattern detecting circuit and output driver including the same

Life of this patent

Data pattern detecting circuit and output driver including the same

Life of this patent

Abstract

Claims18