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An analog front-end circuit applied to ECG signal acquisition

A technology for simulating front-end circuits and ECG signals, applied in the field of biomedical engineering, can solve the problems of increased chip size, increased circuit power consumption, poor reliability, etc., to achieve the effects of improving accuracy, reducing power consumption, and improving reliability

Active Publication Date: 2020-12-22
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently commonly used ECG signal acquisition circuits have the problems of low precision and poor reliability, and it is usually necessary to eliminate the influence of interference and noise by increasing the power supply voltage, increasing the current, and adding additional processing circuits, etc., which also leads to circuit power Increased power consumption, increased chip size

Method used

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  • An analog front-end circuit applied to ECG signal acquisition
  • An analog front-end circuit applied to ECG signal acquisition
  • An analog front-end circuit applied to ECG signal acquisition

Examples

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Embodiment 1

[0047] See figure 1 , figure 1 It is a schematic diagram of an analog front-end circuit applied to ECG signal acquisition provided by an embodiment of the present invention. As shown in the figure, the analog front-end circuit applied to ECG signal acquisition in this embodiment includes an input-feedback chopping module 1 , a capacitive coupling module 2, a two-channel amplifier module 3 and a resistor divider module 4, wherein the input-feedback chopper module 1 has two ECG signal terminals Vin1 and Vin2 for receiving the input of two ECG signals, and The electrocardiographic signal is frequency-modulated and output to the capacitive coupling module 2, and the capacitive coupling module 2 is connected to the two-channel amplifier module 3 for coupling the frequency-modulated electrocardiographic signal and outputting it to the two-channel amplifier module 3. The channel amplifier module 3 is connected to the resistor voltage divider module 4, which is used to amplify the co...

Embodiment 2

[0061] This embodiment provides another analog front-end circuit applied to ECG signal acquisition. Compared with Embodiment 1, the analog front-end circuit of this embodiment also includes a ripple suppression module 5, an electrode imbalance elimination module 6 and a right leg drive circuit 7. See Figure 4 , Figure 4 It is a schematic diagram of another analog front-end circuit applied to ECG signal acquisition provided by the embodiment of the present invention. As shown in the figure, the analog front-end circuit includes an input-feedback chopper module 1, a capacitive coupling module 2, a two-channel amplifier module 3, a resistor divider module 4, a ripple suppression module 5, an electrode offset elimination module 6 and a right leg The drive circuit 7, wherein, the input-feedback chopping module 1, the capacitive coupling module 2, the two-channel amplifier module 3 and the resistor divider module 4 are the same as those in the first embodiment, and will not be r...

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PUM

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Abstract

The invention relates to an analog front end circuit applied for EEG signal acquiring. The analog front end circuit comprises an input-feedback chopped wave module, a capacitance coupling module, twochannel amplifier modules and a resistance partial voltage module, wherein the input-feedback chopped wave module is provided with two EEG signal ends for receiving the input of two paths of the EEG signals, performing frequency modulation on the EEG signals, and outputting the EEG signals after frequency modulation to the capacitance coupling module; the capacitance coupling module is used for performing coupling treatment on the EEG signals after frequency modulation and outputting the EEG signals after coupling treatment to the two channel amplifier modules; the two channel amplifier modules are used for amplifying the EEG signals after coupling treatment and outputting the amplified EEG signals to the resistance partial voltage module; and the resistance partial voltage module is usedfor performing voltage partial treatment of the amplified EEG signals and outputting the amplified EEG signals to the feedback end of the input-feedback chopped wave module. According to the analog front end circuit disclosed by the invention, input impedance is increased, attenuation of the amplitude of the EEG signals is reduced, the EEG signals can be completely obtained, and the acquiring accuracy of the EEG signals is improved.

Description

technical field [0001] The invention belongs to the technical field of biomedical engineering, and in particular relates to an analog front-end circuit applied to electrocardiographic signal collection. Background technique [0002] Heart disease has become one of the main diseases that endanger human health. According to statistics, about 17 million people die of cardiovascular disease every year in the world, accounting for about one-third of the global death toll. Therefore, the diagnosis of cardiovascular disease, Treatment has always been valued by medical circles all over the world. Electrocardiogram is one of the most important bioelectrical information of the human body. It contains a large amount of information for clinical diagnosis of cardiovascular diseases. It is an important means to understand the functional status of the heart, assist in the diagnosis of cardiovascular diseases, and evaluate the effectiveness of various treatment methods. [0003] The electr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/0402A61B5/00H03F3/68
CPCA61B5/7225A61B5/319H03F3/68
Inventor 朱樟明刘怡张程高王靖宇刘术彬刘帘曦
Owner XIDIAN UNIV