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随着脑部研究和EEG诊断的持续突破,人们期望EEG监测装置也能够在传统临床环境以外的新环境中运作,而这些新的环境同时也引发新的设计挑战。在过去20年间,CareFusion Nicolet在EEG诊断系统领域的开发上一直扮演着先驱者的角色。通过运用AD公司广泛的放大器产品线,CareFusion得以优化其模拟前端,应对当今的EEG设计挑战。虽然本文只涵盖了一种EEG应用,但是大部分理论对心电图(ECG)设计工程师也会有所帮助。如同许多EEG和ECG设备设计者所知,电极中的半电池电位差异可能会引起较大的直流失调,测量系统必须能够
With continued breakthroughs in brain research and EEG diagnosis, it is expected that EEG monitoring devices will also be able to operate in new environments outside of the traditional clinical environment, and these new environments will also lead to new design challenges. For the past 20 years, CareFusion Nicolet has been a pioneer in the development of EEG diagnostic systems. By leveraging AD’s broad portfolio of amplifiers, CareFusion is able to optimize its analog front end to meet today’s EEG design challenges. Although this article covers only one type of EEG application, most of the theory will be of use to ECG design engineers. As many EEG and ECG device designers know, half-cell potential differences in electrodes can cause large DC offsets and measurement systems must be able to