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Electroencephalogram signal amplifier for portable event related brain potentiometer

An event-related, EEG signal technology, applied in applications, sensors, medical science, etc., can solve the problems of low integration of EEG amplifiers, difficulty in adapting to neuroelectrophysiology, and difficulty in satisfying interdisciplinary research, achieving cost-effectiveness and maintenance. Easy to upgrade and overcome the effect of gain fluctuation

Inactive Publication Date: 2006-05-31
INST OF PSYCHOLOGY CHINESE ACADEMY OF SCI
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Problems solved by technology

[0011] The object of the present invention is to: overcome the above-mentioned existing EEG amplifiers that are difficult to adapt to the research of neurophysiological aspects in multiple fields, especially the defects that are difficult to meet the needs of interdisciplinary research; and overcome the integration of the above-mentioned existing EEG amplifiers Low, poor scalability, relatively large power consumption and other defects; thus providing a brain potential amplifier that can accurately collect human neurobiological electrical signals, has high integration, low power consumption, miniature modularization, and high cost performance, to meet Research and application needs in neuroscience, cognitive psychology, clinical medicine and criminal psychology

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  • Electroencephalogram signal amplifier for portable event related brain potentiometer
  • Electroencephalogram signal amplifier for portable event related brain potentiometer
  • Electroencephalogram signal amplifier for portable event related brain potentiometer

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Embodiment Construction

[0055] The structure of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0056] Since the brain wave ERP signal is very weak, it must be amplified before ERP signal analysis.

[0057] The EEG signal amplifier adopted in this embodiment (as shown in Figure 1) comprises: brain electrode 1, EEG matching input circuit 2, signal pre-amplification circuit 3, power frequency notch filter circuit 4, signal bandpass filter amplifying circuit 5. A / D conversion circuit 6 and synchronous controller MCU 7; also include a contact resistance detection circuit 8 for electrode and scalp contact impedance detection, and a baseline following drive circuit 9 for improving the anti-interference ability of the amplifier; signal band Also be provided with polarity conversion circuit 11 (as image 3 shown). Brain electrode signals are connected to the positive and negative input terminals of the signal pre-amplification circuit ...

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Abstract

An encephaloelectric signal amplifier for the portable event associated electrocortical potential instrument is composed of cerebral electrodes, encephaloelectric signal preamplifier, main frequency trap circuit, band-pass filtering amplifier, 16 embedded A / D converters, polarity switch and synchronous controller MCU. It can precisely acquire the bioelectric signals of human nerve, filter and amplify them, and record them at real time.

Description

technical field [0001] The invention relates to an electroencephalogram signal amplifier, in particular to an electroencephalogram signal amplifier used in an event-related electroencephalogram apparatus. Background technique [0002] Human beings have always hoped to reveal the secrets of brain activity, and the relationship between brain-cognition-behavior has become a core issue that humans must solve in the process of understanding themselves. The brain is a multi-level, open and complex giant system. As long as the brain is not dead, it will continue to produce brain waves. Evoked potentials can be elicited in the scalp by any external stimulus or when different parts of the sensory pathway are stimulated. With the application of computers in biology, research on advanced functions of the human brain based on event-related potentials (ERP) technology has become a current research method. [0003] Since event-related EEG signals are very weak (only 0-30uV in amplitude)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/0488
Inventor 罗跃嘉罗本成
Owner INST OF PSYCHOLOGY CHINESE ACADEMY OF SCI
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