公开(公告)号：US20170281027A1

公开(公告)日：2017-10-05

申请号：US15091205

申请日：2016-04-05

Applicant: Silicon Laboratories Inc.

Inventor： Moshe M. Altmejd ,  Bruce P. Del Signore ,  Yahui Zhang

IPC: A61B5/024 ,  A61B5/00 ,  A61B5/0205

CPC classification number: A61B5/02427 ,  A61B5/02055 ,  A61B5/02438 ,  A61B5/02444 ,  A61B5/14552 ,  A61B5/681 ,  A61B5/7203 ,  A61B2560/0209 ,  A61B2562/046

Abstract: According to one embodiment, a power-efficient, low noise photoplethysmographic (PPG) sensor module is provided herein comprising at least one light emitting diode (LED) and at least one photodetector. The LED is generally configured for emitting light, and is positioned on the PPG sensor module for transmitting the emitted light into biological tissue. The photodetector is generally configured for detecting a portion of the light that is transmitted by the LED into the biological tissue and reflected back to the photodetector. The photodetector is an elongated photodetector having a longer dimension that is at least 1.5 times larger than a shorter dimension of the elongated photodetector. By positioning the elongated photodetector on the PPG sensor module, such that the longer dimension is facing towards the first LED, the elongated photodetector is configured to collect substantially more of the reflected light, thereby increasing the signal-to-noise ratio of the detected signal.

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.