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Device and method for acquiring biological electric signals

A bioelectric signal and acquisition device technology, applied in medical science, sensors, diagnostic recording/measurement, etc., can solve problems such as high cost and complex circuit, and achieve the effect of fewer devices, high sampling rate, and fast signal detection

Active Publication Date: 2012-06-13
EDAN INSTR
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention is to construct a bioelectrical signal acquisition device and method to overcome the technical problems of complex circuits and high costs in the prior art bioelectrical signal acquisition device and method

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  • Device and method for acquiring biological electric signals
  • Device and method for acquiring biological electric signals
  • Device and method for acquiring biological electric signals

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Embodiment Construction

[0030] The technical solutions of the present invention will be further described below in conjunction with specific embodiments.

[0031] Such as figure 1 , figure 2 As shown, the specific embodiment of the present invention is to construct a bioelectrical signal acquisition device, including multiple acquisition channels 90 for signal acquisition, input protection / low-pass filter circuit 10, buffer 20, channel selection and differential amplification unit 30. Analog-to-digital conversion circuit 60, processor unit 70, the input protection / low-pass filter circuit 10 performs energy limitation on the collected signal to protect the circuit, and then performs low-pass filtering, and the buffer 20 performs Impedance conversion, channel selection and differential amplification unit 30 selects the analog channel that needs to be converted currently and the analog channel that needs to be sampled next and switches, and performs differential amplification and output to the analog...

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Abstract

The invention relates to a device and a method for acquiring biological electric signals. The full differential amplification technology is used on a signal acquisition channel, so that a link that transition is performed by using a single-ended signal in the processes of converting a differential signal into the single-ended signal and converting the single-ended signal into the differential signal in the conventional products is avoided; an analogue switch is utilized reasonably by utilizing the cost advantage of the analogue switch relative to instrument amplifiers and computing amplifiers according to system parameters to reduce the using quantity of the instrument amplifiers; a system can detect a pace-making pulse signal directly in an undistorted mode when reaching the sampling rate of 20 kilo samples per second (Ksps), so that a complex PACE widening circuit is not required to be used; the cost of the system is reduced; in a direct-current amplifying circuit structure, a time constant circuit is not provided, the signals are quickly detected, a baseline is stable, the dynamic input range of the signals is large, a small number of devices are provided, the reliability is high, and the miniaturization of products is facilitated; and by the matching of a high-speed analog-digital converter, the sampling rate of the system can be improved.

Description

technical field [0001] The present invention relates to a bioelectrical signal acquisition device and method, in particular to a bioelectrical signal acquisition device and method for switching and collecting multiple acquisition channels. Background technique [0002] At present, there are usually two methods for detecting weak bioelectrical signals. One is a relatively complex AC amplifier circuit architecture commonly used, including buffering, instrumentation amplification, high-pass filtering, secondary amplification, multi-order low-pass filtering, analog switches, differential level shifting, analog-to-digital conversion and other multi-stage amplification circuits structure. Because the circuit structure uses a high-pass filter with a lower cut-off frequency, when the interference on the lead is large, the output of the first-stage instrument amplifier circuit is saturated, and then the capacitor of the high-pass filter is charged; if the patient's condition recove...

Claims

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Application Information

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IPC IPC(8): A61B5/04
Inventor 何宗奎肖正文
Owner EDAN INSTR
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