Low-noise high-input impedance amplifier applied to wearable dry electrode electrocardio monitoring

Abstract

The invention discloses a low-noise high-input impedance amplifier applied to wearable dry electrode electrocardio monitoring. The amplifier circuit adopts a novel chopping stabilization technology, so that the flickering noise of the circuit is reduced, and an ultralow-frequency electrocardiosignal can be effectively amplified; meanwhile, a sampling input structure is adopted, it is guaranteed that the input impedance of the amplifier is not reduced while the chopping stabilization technology is used, electrocardiosignals can be effectively obtained from high-resistance dry electrodes, and application of wearable dry electrode electrocardio examination is facilitated; an electrode offset suppression circuit adjusted by digital-analog mixing is adopted, so that the noise of the whole circuit is not increased while the + / -300mV electrode offset suppression capability is provided; and a rapid recovery circuit is adopted, so that the recovery time of the electrode imbalance inhibition loop is prolonged, the application of all-weather continuous electrocardiogram detection is facilitated, and a good solution is provided for the Internet of Things plus medical treatment.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to a low-noise high-input impedance amplifier applied to wearable dry electrode ECG monitoring. Background technique [0002] With the development of society and the advancement of science and technology, health issues have gradually become the focus of people's attention. According to WHO statistics, about 41 million people die from non-communicable diseases every year, and more than 50% of them die from cardiovascular diseases. At the same time, WHO predicts that in 2020, the number of people who will die of cardiovascular diseases in the world will be as high as 26 million. The number of sudden cardiac death in my country is as high as 560,000 people every year. However, conventional clinical electrocardiogram detection can only judge diseases such as myocardial ischemia, arrhythmia, and premature beats, and cannot prevent sudden heart attacks. With the formation o...

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Problems solved by technology

[0004] What the present invention aims to solve is the problem that traditional ECG amplifiers cannot be matched with dry electrodes with high output impedance and high electrode imbalance in wearable ECG detection equipment, and provides a device for ECG monitoring with wearable dry electrodes. Low Noise High Input Impedance Amplifier

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