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Optical sensor device
专利权人:
发明人:
Hirofumi Tsuchimoto,Toru Shimuta
申请号:
US15002631
公开号:
US09983053B2
申请日:
2016.01.21
申请国别(地区):
US
年份:
2018
代理人:
摘要:
An optical sensor device includes a light emitter for emitting, to a living body, lights having two wavelengths and blinking at a predetermined frequency, and a light receiver for receiving the lights from the living body. The light receiver outputs first and second detection signals corresponding to the respective wavelengths. A filter circuit extracts, from the first and second detection signals, modulation signals that are obtained with amplitude modulation of signals of the predetermined frequency. The modulation signals are amplified by a post-amplifier and are taken into an arithmetic processing unit after being converted to digital signals by an AD converter. The arithmetic processing unit calculates DC components and AC components of the first and second detection signals by employing the modulation signals converted the digital signals.
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