Low-power contactless physiological sensor

Yue, Alex; Kiely, Janice; Atwood, David

Abstract

A system-on-chip contactless physiological sensor (10) is provided which comprises a capacitive-sensor electrode (14) having a first capacitance (C1) and an amplifier device (18) connected to the capacitive-sensor electrode (14), the capacitive-sensor electrode (14) and amplifier device (18) at least in part forming an amplifier circuit for the physiological sensor (10). An artefact-reducing capacitor (20) is then connected in series between the capacitive-sensor electrode (14) and an input of the amplifier device (18), the artefact-reducing capacitor (20) having a second capacitance (C2) which is less than the first capacitance (C1). In this sensor (10), there is no impedance boosting input between the capacitive-sensor electrode (14) and the input of the amplifier device (18)

• Acceptance Date: Dec 18, 2020
• Online Publication Date: Jun 24, 2021
• Publication Date: Jun 24, 2021
• Deposit Date: Dec 8, 2021
• Public URL: https://uwe-repository.worktribe.com/output/7860498
• Additional Information: https://patentscope.wipo.int/search/en/detail.jsf?docId=WO2021123794&_cid=P11-KU2EZH-05500-1