Patent ID: 8855758

Claim:
An apparatus for obtaining EEG data comprising: a signal processing component that receives one or more EEG signals from each of a plurality of electrodes; and a data output component, the signal processing component converting respective EEG signals in real time to a reduced data set and providing the reduced data set to the data output component, wherein the signal processing component recognizes a part of the received one or more EEG signals corresponding to one or more EEG signal profiles of an expected EEG feature and provides a section of data corresponding to the recognized part to the data output component, wherein the signal processing component includes a voltage offset removal component that removes voltage offset to reduce a number of bits of the data set, wherein the voltage offset removal component comprises an analogue component, wherein the analogue component comprises an analogue chopper amplifier, wherein the analogue chopper amplifier comprises sequentially an input chopper switch circuit stage, an amplifier stage and an output chopper switch circuit stage, wherein an effective resistance and input capacitance of the input chopper switch circuit stage and an input capacitance of the amplifier stage are configured to form a high pass filter, and wherein the amplifier stage includes a CMOS component in weak inversion.