US 11,980,480 B2
Contact detection for physiological sensor
Chad A. Bossetti, Colorado Springs, CO (US); Thomas J. Sullivan, San Jose, CA (US); Xiaoyu Guo, Santa Clara, CA (US); Paras Samsukha, San Jose, CA (US); and Anirban Chatterjee, San Jose, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Aug. 22, 2022, as Appl. No. 17/821,433.
Application 17/821,433 is a continuation of application No. 16/565,090, filed on Sep. 9, 2019, granted, now 11,478,193.
Claims priority of provisional application 62/729,590, filed on Sep. 11, 2018.
Prior Publication US 2022/0401025 A1, Dec. 22, 2022
Int. Cl. A61B 5/00 (2006.01); A61B 5/24 (2021.01); A61B 5/30 (2021.01); A61B 5/304 (2021.01)
CPC A61B 5/6844 (2013.01) [A61B 5/24 (2021.01); A61B 5/681 (2013.01); A61B 5/7203 (2013.01); A61B 5/7228 (2013.01); A61B 5/7475 (2013.01); A61B 5/30 (2021.01); A61B 5/304 (2021.01)] 20 Claims
OG exemplary drawing
 
1. A device comprising:
sensing circuitry configured to sense a physiological signal, the sensing circuitry including a first sensing circuit configured to sense a first electrode and a second sensing circuit configured to sense a second electrode;
a stimulation circuit configured to drive a stimulation signal on the first electrode; and
processing circuitry coupled to the sensing circuitry, the processing circuitry programmed to, while measuring the physiological signal using one or more signals measured by the first sensing circuit and using one or more signals measured by the second sensing circuit:
in accordance with a determination that a first signal of the one or more signals measured by the first sensing circuit in response to the stimulation signal fails to meet one or more criteria, cease measuring the physiological signal.