Patent · US Active

Systems and methods for measuring current output by a photodetector of a wearable sensor unit that includes one or more magnetometers

US11131724B2 · kind B2 · utility

0Cited by

81References

30Claims

0Family size

Assignee

HI LLC · US

Inventors

Stephen Garber · Santa Monica, US
Jerry Leung · Santa Monica, US
Ethan Pratt · Santa Clara, US
Hooman Mohseni · Wilmette, US
Jamu Alford · Lake Arrowhead, US
Dakota Blue Decker · Culver City, US
Jeffery Kang Gormley · Calabasas, US
Michael Henninger · Austin, US
Scott Michael Homan · Culver City, US
Teague Lasser · Los Angeles, US
Micah Ledbetter · Sunnyvale, US
Scott Jeremy Seidman · Glenview, US
Benjamin Siepser · Los Angeles, US

Key dates

Filing date	Apr 30, 2020
Grant date	Sep 28, 2021
Priority date	—
Expiry date	Apr 30, 2040

Classification

Technology area (CPC H)Electricity
CPC primaryH05K2201/10151
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

An exemplary magnetic field measurement system includes a wearable sensor unit and a controller. The wearable sensor unit includes 1) a magnetometer comprising a photodetector and 2) a magnetic field generator configured to generate a compensation magnetic field configured to actively shield the magnetometer from ambient background magnetic fields. The controller is configured to interface with the magnetometer and the magnetic field generator and includes a differential signal measurement circuit configured to measure current output by the photodetector.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.