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Signal processing circuit

A signal processing circuit and circuit technology, applied in the field of electrical signal processing, can solve problems such as strong noise of human electrical signals

Inactive Publication Date: 2019-03-26
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Based on this, the purpose of the present invention is to provide a signal processing circuit to solve the technical problem in the prior art that there is strong noise after the human body electrical signal is amplified and processed.

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Embodiment Construction

[0064] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Several embodiments of the invention are shown in the drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the present invention will be thorough and complete.

[0065] It should be noted that when an element is referred to as being “fixed on” another element, it may be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of illustration only.

[0066] Unless otherwise def...

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Abstract

The invention provides a signal processing circuit. The signal processing circuit comprises two signal acquisition electrodes, a signal amplification circuit and a signal conversion circuit, which aresequentially in series connection, wherein the signal amplification circuit comprises a front amplification circuit, a capacitive coupling circuit, a rear amplification circuit, a filter circuit anda feedback circuit. An input end of the front amplification circuit is electrically connected with an output end of a signal acquisition electrode; the input end of the capacitive coupling circuit isin circuit connection with the output end of the front amplification circuit; the input end of the rear amplification circuit is electrically connected with the output end of the capacitive coupling circuit; the filter circuit is connected between the output end of the rear amplification circuit and the input end of the signal conversion circuit; and the input end of the feedback circuit is electrically connected with the output end of the capacitive coupling circuit, and the output end of the feedback circuit is electrically connected with the front amplification circuit. By the adoption of the signal processing circuit, noise cannot be additionally added to an electric signal, and original noise in the electric signal can be eliminated, so that the noise of output electric signal is small, and the diagnosis accuracy is improved.

Description

technical field [0001] The invention relates to the technical field of electrical signal processing, in particular to a signal processing circuit. Background technique [0002] In the medical industry, in order to grasp the vital signs of patients, it is often necessary to collect weak human body electrical signals from strong common-mode voltage and noise, such as EEG signals (brain waves), ECG signals, EMG signals, etc. Wait. [0003] Since the electrical signal of the human body is relatively weak, generally in the range of 20-500Hz, the signal strength is also very weak, so it is necessary to amplify the electrical signal of the human body after collection and output it, so as to finally present it on the signal map (such as EEG, ECG, Electromyography) to facilitate the diagnosis. [0004] However, in the prior art, the currently used human body electrical signal processing circuit will cause the human body electrical signal to be amplified and processed with strong no...

Claims

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Application Information

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IPC IPC(8): A61B5/04
CPCA61B5/316
Inventor 胡锦吴运卢韵丞
Owner HUNAN UNIV
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