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1. (WO2018202822) ELECTRONIC FITNESS DEVICE WITH OPTICAL CARDIAC MONITORING

Pub. No.:    WO/2018/202822    International Application No.:    PCT/EP2018/061444
Publication Date: Fri Nov 09 00:59:59 CET 2018 International Filing Date: Fri May 04 01:59:59 CEST 2018
IPC: A61B 5/024
A61B 5/145
A61B 5/1455
A61B 5/00
Applicants: GARMIN SWITZERLAND GMBH
MACDONALD, Paul R.
KULACH, Christopher J.
ROONEY, James K.
Inventors: MACDONALD, Paul R.
KULACH, Christopher J.
ROONEY, James K.
Title: ELECTRONIC FITNESS DEVICE WITH OPTICAL CARDIAC MONITORING
Abstract:
An electronic fitness device comprises a first optical transmitter array, a first optical receiver, a second optical receiver, and a processing element. The first optical transmitter array includes first optical transmitter operable to transmit a first optical signal having a first wavelength and a second optical transmitter operable to transmit a second optical signal having a second wavelength. The first optical receiver is operable to receive modulated optical signals and generate a first photoplethysmogram (PPG) signal resulting from the first optical signal and a second PPG signal resulting from the second optical signal. The second optical receiver is operable to receive modulated optical signals and generate a third PPG signal resulting from the first optical signal and a fourth PPG signal resulting from the second optical signal. The processing element is operable to determine cardiac information of the user based on the received PPG signals.