Unlock instant, AI-driven research and patent intelligence for your innovation.

An Instrumentation Amplifier for Bioelectrical Signals

A technology of instrumentation amplifiers and bioelectrical signals, applied in applications, sensors, medical science, etc., can solve problems such as inaccurate compensation of chopper amplifiers

Active Publication Date: 2019-09-06
ZHEJIANG UNIV
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the existence of the offset voltage of the integrator, the compensation current formed by the transconductance often cannot accurately compensate the offset of the chopper amplifier, and cannot form a good suppression effect on the output voltage ripple of the chopper amplifier

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • An Instrumentation Amplifier for Bioelectrical Signals
  • An Instrumentation Amplifier for Bioelectrical Signals
  • An Instrumentation Amplifier for Bioelectrical Signals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] In order to describe the present invention more specifically, the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0037] Such as figure 1 Shown, the present invention is used for the instrumentation amplifier of bioelectricity signal and comprises: High-frequency chopper CH in , input capacitance C in1 ~C in2 , MOS tube (M 1-2 , M 3-4 , M 5-6 , M 7-8 , M 9-10 , M 11-12 ) formed pseudo-resistor, two Ping-Pong self-adjusting amplifier structures with the same structure and complementary timing, DC blocking capacitor C 11-12 , High frequency chopper CH m , Class-A output stage, positive feedback loop, negative feedback loop and gain adjustable amplifier.

[0038] The instrumentation amplifier is first input by the high frequency chopper CH in The bioelectrical signal at the input terminal is chopped, modulated to 80kHz, and passed through the input capacitor ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an instrument amplifier for bioelectrical signals, which greatly reduces the flicker noise of the instrument amplifier by adopting high-frequency chopping technology and achieves a very small noise level. Simultaneously, the present invention has just realized the elimination of the output ripple of the capacitively coupled chopper amplifier in the main path by combining the Ping-Pong self-adjusting amplifier structure and the use of the DC blocking capacitor, so that the output of the instrument amplifier is not disturbed by the ripple signal , resulting in a larger signal swing. In addition, the present invention realizes the function of variable gain and variable bandwidth of the instrumentation amplifier through the use of the second-stage variable gain amplifier and variable Miller capacitance, wherein the gain can vary from 40dB to 60dB, and the bandwidth can vary from 1kHz to 10kHz , and the main amplifier in the variable gain amplifier is powered by two voltages, which reduces the power consumption by nearly half compared with the amplifier powered by one voltage.

Description

technical field [0001] The invention belongs to the technical field of biomedical electronics, and in particular relates to an instrument amplifier for bioelectric signals. Background technique [0002] At present, ECG monitoring system, EEG monitoring system and nerve signal recording system are a research hotspot in the field of biomedical electronics at home and abroad. The recording and research of ECG signals, EEG signals and neural signals has a wide range of application values. The central electrical signals are of great significance to the detection of cardiac physiological and pathological changes. EEG signals and neural signals are useful for detecting and diagnosing neurological diseases, such as epilepsy, etc. They are of high value, and their research progress is of great significance for future neural prostheses and curing neurological diseases. A high-performance instrumentation amplifier is a critical building block for electronic systems that record and det...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/04A61B5/0402A61B5/0428A61B5/308
CPCA61B5/7203A61B5/7225A61B5/30A61B5/319
Inventor 赵梦恋董阳涛朱波汤立汉姚焱遐吴晓波
Owner ZHEJIANG UNIV