Patent ID: 8797068

Claim:
An input/output sense amplifier configured to amplify data inputted through a pair of local transmission lines in response to a sense amplifier enable signal and a test mode signal, output the data through a global transmission line, generate a control signal by sensing whether the data have been amplified, and halt amplification of the data in response to the control signal when amplification is complete, wherein the input/output sense amplifier comprises: a sense amplification block configured to amplify the data inputted through the pair of local transmission lines in response to the sense amplifier enable signal and the control signal, and transmit the data to first and second output lines; a control block configured to determine whether the data received through the first and second output lines have been amplified, in response to the sense amplifier enable signal and the test mode signal, and to generate a switch signal and the control signal; and an output block connected with the control block through first and second test lines, and configured to output the data transmitted from the first and second output lines to the global transmission line, in response to the switch signal.