• Title/Summary/Keyword: Precision-amplifier

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The Design of High Precision Pre-amplifier for EEG Signal Measurement (뇌파신호 측정을 위한 고정밀 전치 증폭기의 설계)

  • 유선국;김남현
    • Journal of Biomedical Engineering Research
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    • v.16 no.3
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    • pp.301-308
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    • 1995

  • A high-precision pre-amplifier is designed for general use in EEG measurement system. It consists of signal generator, signal amplifier with a impedance converter, shield driver, body driver, differential amplifier, and isolation amplifier. The combination of minimum use of inaccurate passive components and the appropriate matching of each monolithic amplifiers results in good noise behavior, low leakage current, high CMRR, high input impedance, and high IMRR. The performance of EEG pre-amplifier has been verified by showing the typical EEG pattevn of a nomad person through the clinical experiments.

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Precision DC Amplifier Design using Semiconductor Chopper (반도체식 Chopper를 이용한 정밀직류증폭기의 설치)

  • 김원기
    • Journal of Biomedical Engineering Research
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    • v.2 no.1
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    • pp.55-64
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    • 1981

  • The important parameters of DC amplifier, which is widely use4 for the medical and engineering fields, are input offset voltage and temperature drift. Chopping amplifier reduces approximately 10% the parameters changing than monolithic operational amplifier. In this study, a chopping amplifier with semiconductor chopper is designed and tested, this chopper is realized by CMOS analog switch and timing circuits. The test results approve that designed amplifier is suitable for precision instrument DC amplifier.

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Fabrication of High Precision Pre-amplifier for EEG Signal Measurement and Development of Auto Classification System (뇌파신호 측정을 위한 고성능 전치증폭기 제작 및 자동 신호분류 시스템 개발)

  • 도영수;장긍덕;남효덕;장호경
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2000.11a
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    • pp.409-412
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    • 2000

  • A high performance EEG signal measurement system is fabricated. It consists of high precision pre-amplifier and auto identification bandwidth unit. High precision pre-amplifier is composed of signal generator, signal amplifier with a impedance converter, body driver and isolation amplifier. The pre-amplifier is designed for low noise characteristics, high CMRR, high input impedance, high IMRR and safety, Auto identification bandwidth unit is composed of AD-converter and PIC micro-controller for real time processing EEG signal. The performance of EEG signal measurement system has been shown the classified bandwidth through the clinical demonstrations.

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