Electronic circuit with light sensor, variable resistance and amplifier
US10039457B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 26, 2015 |
| Grant date | Aug 7, 2018 |
| Priority date | — |
| Expiry date | Mar 31, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/261
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Embodiments include circuits, apparatuses, and systems for optical heart rate monitor light sensor amplifiers. In embodiments, an electronic circuit may include a differential amplifier having an inverting terminal, a non-inverting terminal, and an output terminal; a first variable resistance circuit coupled with a reference voltage, the inverting terminal of the differential amplifier, and the output terminal of the differential amplifier; a second variable resistance circuit coupled with the non-inverting terminal of the differential amplifier and the reference voltage; and a light sensor to generate an electrical signal in response to light reflected by skin of a user, the light sensor coupled with the non-inverting terminal and the inverting terminal of the differential amplifier. Other embodiments may be described and claimed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.