| 摘要 |
PURPOSE: An oxygen saturation measurement device using a single power supply amplification module is provided to control the range of an ADC(analog-to-digital converter) in a full band by using a voltage for OFFSET control. CONSTITUTION: A light irradiation module(100) irridates light to a specific part of a body. A light detecting module(200) receives the light and converts the light into an electric signal. A signal separation module(300) separates electric signals corresponding to the light. An extraction module(400) extracts AC and DC components from the separated electric signal. An amplification module(500) amplifies the AC components of the extracted electric signal. [Reference numerals] (100) Light irradiation module; (110) Light emitting means controller; (120) Light emitting means; (200) Light detecting module; (210) Light detector; (220) Current-voltage converter; (300) Signal separation module; (310A,310B) Sample/hold; (400) Extraction module; (410A,410B) Filter; (420A,420B) Low pass filter; (430A,430B) Band pass filter; (500) Amplification module; (510A,510B) Single power OP AMP; (600) Conversion module; (700) Oxygen saturation measuring module; (710) Ratio calculator; (720) Look-up table for correcting oxygen saturation; (800) Display module; (900) Timing control module
|
