Amplifying and demodulating circuit applied to portable monitoring equipment

Abstract

An amplification and demodulation circuit applied to portable monitoring equipment, electrodes are connected to a chopping modulation circuit, and the chopping modulation circuit is connected to the amplification and demodulation circuit. The amplification and demodulation circuit is divided into two outputs. After ripple filtering and low-pass filtering, the ECG signal and the tissue impedance signal are respectively output; Signal processing can suppress the harmonic current noise at the input end, and reduce errors caused by flicker noise and offset voltage in the amplifying circuit; because the ECG signal and the body tissue impedance signal share electrodes, chopping modulation circuit and amplification and demodulation Circuit, the circuit structure has been simplified, which is more in line with the requirements of portable monitoring equipment for low power consumption and small size of the circuit.

Description

technical field [0001] The invention relates to the design of portable monitoring equipment, in particular to the design of an amplification and demodulation circuit applied to the portable monitoring equipment. Background technique [0002] Portable monitoring equipment can monitor and diagnose the vital signs of the user without affecting the daily activities of the user, which has the advantage of taking into account both health and quality of life. However, since the portable monitoring equipment collects and analyzes the vital sign signal in the user's active environment, the signal obtained by it has large interference and errors, so the relevant signal acquisition circuit needs to have strong anti-interference ability. Portable monitoring equipment also has high requirements in terms of miniaturization and low power consumption. On the premise of ensuring signal quality, simplifying the circuit structure can effectively solve the problems of circuit size and power con...

AI Technical Summary

Problems solved by technology

However, since the portable monitoring equipment collects and analyzes the vital signs signal in the user's active environment, the signal obtained by it has large interference and error, so the relevant signal acquisition circuit needs to have strong anti-interference ability

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