Ricky C Jackson

US Patent:

20190324097, Oct 24, 2019

Filed:

Jul 3, 2019

Appl. No.:

16/502317

Inventors:

- Dallas TX, US
Dok Won Lee - Mountain View CA, US
William David French - San Jose CA, US
Byron J.R. Shulver - Kilmacolm, GB
Thomas Dyer Bonifield - Dallas TX, US
Ricky Alan Jackson - Richardson TX, US
Neil Gibson - Largs, GB

International Classification:

G01R 33/04
G01R 33/00

Abstract:

An integrated fluxgate device has a magnetic core disposed over a semiconductor substrate. A first winding is disposed in a first metallization level above and a second metallization level below the magnetic core, and is configured to generate a first magnetic field in the magnetic core. A second winding is disposed in the first and second metallization levels and is configured to generate a second magnetic field in the magnetic core. A third winding is disposed in the first and second metallization levels and is configured to sense a magnetic field in the magnetic core that is the net of the first and second magnetic fields.

US Patent:

20170343622, Nov 30, 2017

Filed:

May 31, 2016

Appl. No.:

15/169639

Inventors:

- Dallas TX, US
Dok Won Lee - Mountain View CA, US
William David French - San Jose CA, US
Byron J R Shulver - Kilmacolm, GB
Thomas Dyer Bonifield - Dallas TX, US
Ricky Alan Jackson - Richardson TX, US
Neil Gibson - Largs, GB

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

G01R 33/04
G01R 33/00

Abstract:

An integrated fluxgate device has a magnetic core on a control circuit. The magnetic core has a volume and internal structure sufficient to have low magnetic noise and low non-linearity. A stress control structure is disposed proximate to the magnetic core. An excitation winding, a sense winding and a compensation winding are disposed around the magnetic core. An excitation circuit disposed in the control circuit is coupled to the excitation winding, configured to provide current at high frequency to the excitation winding sufficient to generate a saturating magnetic field in the magnetic core during each cycle at the high frequency. An isolation structure is disposed between the magnetic core and the windings, sufficient to enable operation of the excitation winding and the sense winding at the high frequency at low power.