Patent ID: 7758513

Claim:
A bio signal measurement apparatus for simultaneously measuring at least two bio signals generated by a human body, the bio signal measurement apparatus comprising: a stimulus signal generating unit configured to generate a stimulus signal to be applied to the human body; a sensing unit configured to contact the human body, wherein the sensing unit includes a plurality of electrodes to which the stimulus signal is applied and which plurality of the electrodes are configured to detect signals from the human body that occur simultaneously, wherein the signals comprise a first bio signal and a second bio signal included in at least one intermediate signal, wherein the first bio signal is generated by the human body in response to the stimulus signal applied to the human body, and the second bio signal is naturally generated by the human body, wherein the sensing unit is configured to share at least one of the plurality of electrodes to apply the stimulus signal to the human body and to detect the at least one intermediate signal including the first bio signal and the second bio signal; a signal acquisition unit configured to acquire the detected at least one intermediate signal and to separate the first bio signal and the second bio signal from the at least one intermediate signal detected from the sensing unit, a first temporal separating unit configured to operate in response to a control signal and configured to apply the stimulus signal to the human body via the sensing unit in a first interval of a sampling period of a pulse signal for detecting the signals from the human body; a second temporal separating unit configured to operate in response to the control signal and configured to provide a first intermediate signal detected from the sensing unit in the first interval and a second intermediate signal detected from the sensing unit in a second interval of the sampling period to the signal acquisition unit; and a controller configured to generate the control signal.