Photoplethysmography sensor and semiconductor device including the same
US12350026B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 2021 |
| Grant date | Jul 8, 2025 |
| Priority date | — |
| Expiry date | Jun 5, 2043 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/681
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A photoplethysmography sensor that includes a photoelectric conversion element including a first terminal and a second terminal, and that receives light reflected from a blood vessel and generates a current corresponding to the received light, a current-to-voltage converter that receives the generated current through a first input terminal and a second input terminal, and generates an output voltage corresponding to the received current, and a switch that, in response to a control signal of a first level, connects the first and second terminals of the photoelectric conversion element respectively to the first and second input terminals of the current-to-voltage converter and in response to the control signal of a second level different from the first level, connects the first and second terminals of the photoelectric conversion element respectively to the second and first input terminals of the current-to-voltage converter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.