公开(公告)号：US10595785B2

公开(公告)日：2020-03-24

申请号：US14872605

申请日：2015-10-01

Applicant: Silicon Laboratories Inc.

Inventor： Qin Wang ,  Yahui Zhang ,  David Clark ,  Moshe M. Altmejd

IPC: A61B5/00 ,  A61B5/024

Abstract: An apparatus includes a first electromagnetic sensor configured to generate a first sensed signal based at least in part on detection of a first signal having a first wavelength. The apparatus includes a second electromagnetic sensor configured to generate a second sensed signal based at least in part on detection of a second signal having a second wavelength different from the first wavelength. The apparatus includes a processing circuit configured to generate a plethysmogram based at least in part on the first sensed signal and the second sensed signal. The apparatus may include a first emitter configured to emit an optical signal having the first wavelength. The apparatus may include a second emitter configured to emit a reference signal. The first wavelength may be a human-blood-sensitive and human-skin-penetrable wavelength and the second wavelength may be at least one of a human-blood-insensitive wavelength and a human-skin-impenetrable wavelength.

公开(公告)号：US20170095211A1

公开(公告)日：2017-04-06

申请号：US14872605

申请日：2015-10-01

Applicant: Silicon Laboratories Inc.

Inventor： Qin Wang ,  Yahui Zhang ,  David Clark ,  Moshe M. Altmejd

IPC: A61B5/00 ,  A61B5/024

CPC classification number: A61B5/721 ,  A61B5/0082 ,  A61B5/02427 ,  A61B5/02433

Abstract: An apparatus includes a first electromagnetic sensor configured to generate a first sensed signal based at least in part on detection of a first signal having a first wavelength. The apparatus includes a second electromagnetic sensor configured to generate a second sensed signal based at least in part on detection of a second signal having a second wavelength different from the first wavelength. The apparatus includes a processing circuit configured to generate a plethysmogram based at least in part on the first sensed signal and the second sensed signal. The apparatus may include a first emitter configured to emit an optical signal having the first wavelength. The apparatus may include a second emitter configured to emit a reference signal. The first wavelength may be a human-blood-sensitive and human-skin-penetrable wavelength and the second wavelength may be at least one of a human-blood-insensitive wavelength and a human-skin-impenetrable wavelength.