Wide-dynamic range pulse blood oxygen measurement system
A wide dynamic range, pulse oximetry technology, applied in diagnostic recording/measurement, medical science, sensors, etc., can solve problems such as unable to amplify AC components, fail to achieve expectations, and affect effective measurement of blood oxygen saturation, so as to improve the reliability Noise ratio, increasing dynamic range, and improving the effect of photoelectric signal intensity
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[0026] Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.
[0027] A wide dynamic range pulse oximetry system such as figure 2 As shown, it includes a double-beam light-emitting unit, a pre-stage detection amplifier circuit, a DC elimination circuit, a buffer amplifier unit, a central processing unit module, and an output module. , the DC elimination circuit, the buffer amplifier unit and the output module are connected, and the pre-stage detection amplifier circuit, the DC elimination circuit, and the buffer amplifier unit are connected in sequence. The central processor module controls the light emission of the double-beam light-emitting unit, the central processor module samples the output signal of the pre-stage detection amplifier circuit and the output signal of the buffer amplifier circuit, and outputs the analyzed DC component to the DC elimination circuit The DC elimination circuit eliminates...
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