Lead-on detection circuitry of biopotential acquisition system

A contact detection and acquisition system technology, applied in the direction of generating electrical pulses, multiple input and output pulse circuits, pulse generation, etc., can solve the problems of power line common mode interference detection, detection circuit detection circuit error action, error, etc.

Pending Publication Date: 2021-08-03
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the small size of dry electrodes used in portable medical devices, the lead detection circuit may be affected by the large impedance of the electrodes, power line common mode interference (such as 60Hz interference) and electrode

Method used

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  • Lead-on detection circuitry of biopotential acquisition system
  • Lead-on detection circuitry of biopotential acquisition system
  • Lead-on detection circuitry of biopotential acquisition system

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Embodiment Construction

[0013] Certain terms are used throughout the description and claims to refer to particular components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. "Includes" and "comprises" mentioned throughout the description and claims are open-ended terms, so they should be interpreted as "including but not limited to". "Substantially" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect. In addition, the term "coupled" includes any direct and indirect electrical connection means. Therefore, if it is described in the text that a first device is coupled to a second device, it means that the first device may b...

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Abstract

The present invention provides a lead-on detection circuitry of a biopotential acquisition system. The lead-on detection circuitry includes an input terminal, a duty-cycle controller, a transmitting signal generator and a mixer-based receiver. The duty-cycle controller is configured to generate a first clock signal. The transmitting signal generator is configured to generate a transmitting signal to the input terminal according to the first clock signal. The mixer-based receiver is configured to perform a mixing operation based on the first clock signal and the transmitting signal to generate an output signal, wherein the output signal indicates if an electrode of the biopotential acquisition system is in contact with a human body, and the electrode is coupled to the input terminal. According to the embodiment of the invention, power line common-mode interference and electrode tissue offset can be reduced, and the detection accuracy is improved.

Description

technical field [0001] The invention relates to the technical field of medical equipment, in particular to a lead contact detection circuit of a biopotential acquisition system. Background technique [0002] Conventional medical devices typically use large dry or wet electrodes to measure physiological signals to obtain physiological characteristics such as bioimpedance or electrocardiogram. Recently, personal biosensors such as portable / wearable medical devices have become popular for providing physiological information for users' reference at any time. Considering the use and design of these portable medical devices, smaller dry electrodes are more appropriate. However, smaller dry electrodes mean poorer electrode impedance, and poorer electrode impedance (ie, larger electrode impedance) may cause detection errors in a lead-on detection procedure of the medical device. [0003] Specifically, when the electrodes of the portable medical device are not in contact with the h...

Claims

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Application Information

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IPC IPC(8): A61B5/053A61B5/24
CPCA61B5/053A61B5/30A61B5/6843A61B2560/0209H03D7/00H03K3/017H03K5/24H04L7/0012H03K5/249
Inventor 陈志鑫
Owner MEDIATEK INC
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