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Electroencephalogram amplifier

An amplifier and current amplification technology, applied in sensors, medical science, diagnostic recording/measurement, etc., can solve problems such as insufficient common-mode signal rejection, achieve high common-mode rejection ratio, high input impedance, and improve signal quality.

Pending Publication Date: 2021-10-22
SHENZHEN YINGZHI TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides an EEG amplifier, which aims to solve the problem of insufficient suppression of common-mode signals when the existing EEG amplifier amplifies the EEG signal

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  • Electroencephalogram amplifier
  • Electroencephalogram amplifier
  • Electroencephalogram amplifier

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Embodiment Construction

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0020] It should also be understood that the terminology used in the description of the present invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the present invention. As used in this specification and the appended claims, the singular forms "a", "an" and "the" are intended to include plural referents unless the context clearly dictates otherwise.

[0021] It should also be further unders...

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Abstract

The invention discloses an electroencephalogram amplifier which comprises a signal acquisition module, a current amplification module, a differential amplification module and a signal output module, the signal acquisition module comprises a recording electrode, a reference electrode and a ground electrode, and the current amplification module comprises a recording amplifier, a reference amplifier and a ground amplifier, the recording electrode is connected with the first resistor and serves as the front electrode of the recording amplifier, the rear electrode of the recording amplifier is connected with the front electrode of the differential amplification module, the reference electrode is connected with the second resistor and serves as the front electrode of the reference amplifier, the rear electrode of the reference amplifier is connected with the front electrode of the differential amplification module, and the rear electrode of the reference amplifier serves as the front electrode of the ground amplifier, the gain feedback end of the differential amplification module serves as the front electrode of the ground amplifier, and the ground electrode is connected with the third resistor and serves as the rear electrode of the ground amplifier, so that the electroencephalogram amplifier has the characteristic of high input impedance, and meanwhile, an output common-mode signal has an equipotential point and is zero, so that common-mode interference is eliminated, and a higher common-mode rejection ratio is achieved.

Description

technical field [0001] The invention relates to the field of EEG acquisition equipment, in particular to an EEG amplifier. Background technique [0002] An EEG signal is a weak electrical signal that is collected at the target's brain location and is commonly used in medical devices. [0003] Because EEG signal acquisition requires high input impedance, high common mode rejection ratio, high resolution, strong anti-interference, and large magnification. Therefore, in terms of device selection, high-precision op amps with high gain, low offset voltage, small bias current, high common-mode rejection ratio, and low noise are the most important. Suppression of interference signals during EEG acquisition is a key step for high-quality EEG acquisition. [0004] However, the collected EEG signals usually include differential signals and common-mode signals. After collection, the common-mode signals need to be suppressed to obtain accurate differential signals. The common-mode sup...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/369A61B5/31A61B5/305
CPCA61B5/369A61B5/31A61B5/305
Inventor 龙景焱刘成杰徐锋
Owner SHENZHEN YINGZHI TECH
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