Patent ID: 11921134
Assignee: TEXAS INSTRUMENTS INCORPORATED
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A system for sensing current, comprising:
a core of a first ferromagnetic material shaped as a toroid including an air gap;
a conductor configured for carrying a first electrical current, the conductor shaped as a wire traversing the toroid, a magnetic field due to the first current configured to generate a first magnetic flux in the toroid and across the air gap;
a device in the air gap spaced from the conductor by a clearance, the device including a semiconductor integrated circuit die in a package, the semiconductor integrated circuit die including a sensor including a first coil wrapped around at least one bar of a second ferromagnetic material configured to sense the magnetization of the at least one bar, the package having a first outer surface free of device terminals and an opposite second outer surface including exposed device terminals; and
a discrete plate of a third ferromagnetic material in the clearance, the discrete plate being conformal with the first outer surface of the package.