Patent ID: 11965944
Assignee: APPLE INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A transmitter of a magnetic tracking system, the transmitter comprising:
a single-axis coil;
a current driver coupled to the single-axis coil and configured to provide current to the single-axis coil to cause the single-axis coil to emit an alternating current (AC) magnetic field;
one or more inertial sensors;
a direct current (DC) magnetometer;
a wireless transceiver;
one or more processors;
memory coupled to the one or more processors and storing instructions that when executed by the one or more processors, cause the one or more processors to perform operations, comprising:
causing the current driver to provide current to the single-axis coil to emit a magnetic field;
determining, using output from the one or more inertial sensors and DC magnetometer, an attitude of the transmitter; and
causing the wireless transceiver to transmit the attitude and clock sync signal to a receiver.