Protective circuitry for external sensing applications
US11751790B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 2019 |
| Grant date | Sep 12, 2023 |
| Priority date | — |
| Expiry date | Mar 14, 2042 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2562/0209
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Galvanic corrosion of an external electrode of a physiological signal sensor (e.g., ECG sensor) can be reduced. In some examples, protective circuitry, such as a switching circuit, can be used to reduce galvanic corrosion. In a first mode of operation (e.g., corresponding to measurement by the physiological signal sensor), the switching circuit can provide a low-impedance path (e.g., from an external electrode to ground). In a second mode of operation (e.g., corresponding to non-measurement by the physiological sensing system), the switching circuit can provide a high-impedance path to reduce leakage currents (e.g., between the external electrode and ground), and thereby reduce galvanic corrosion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.