Circuit system for measuring pulse and blood oxygen saturation degree

Abstract

The invention discloses a circuit system for measuring pulse and blood oxygen saturation degree, and relates to the field of design of analogue integrated circuits. The circuit system comprises a front-mounted differential amplification circuit, a baselinedrift suppressing circuit, a low-pass filtering circuit, a high-pass filtering circuit, a second-stage alternating current amplifying circuit and a power supply management module. According to the circuit system disclosed by the invention, a pulse blood oxygen signal is acquired by adopting a reflective blood oxygen sensor probe, and an acquired physiological signal is fed into a researched circuit system for processing. An operational amplifier is designed by using a UMC-18-CMOS 1P6M process, then the amplifying circuit and the filtering circuits are set up so as to realize amplifying and filtering of the acquired pulse blood oxygen signal, and finally a direct current value and an alternating current value of pulse waves are obtained. Meanwhile, signal loss and the occupied space are reduced, and the reliability and the stability are improved.

Description

technical field [0001] The invention relates to the field of analog integrated circuit design, in particular to a circuit system for measuring pulse and blood oxygen saturation. Background technique [0002] In the 21st century, the Internet of Things technology, microelectronics technology and modern sensing technology have made great progress and been widely used, which has led to the development of medical monitoring equipment in the direction of miniaturization, integration and intelligence, and began to provide health services for individuals anytime and anywhere. In recent years, due to factors such as economic development, population aging and the sudden rise of various cardiovascular diseases, the demand for patient monitoring is increasing, so the demand for corresponding medical equipment is also becoming more and more extensive. The more important physiological signals are oxygen and pulse. Oxygen is the key substance to maintain the life activities of the human ...

AI Technical Summary

Problems solved by technology

However, the transmissive method has many limitations. For example, it can only be used to measure fingers, auricles and toes. In many cases, it is necessary to measure cerebral blood oxygen, muscle blood oxygen or fetal blood oxygen. The method is born from the application

Reflective measurement technology is still immature at this stage, and the research on biomedical ASICs has not yet flourished, only some universities and research institutes are doing research, such as: the Institute of Semiconductors of the Chinese Academy of Sciences is currently studying the biomedical technology of ECG and blood oxygen. dedicated circuit

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