Patent ID: 11877837
Assignee: KONINKLIJKE PHILIPS N.V.
Field: Medical technology (Instruments)
Classification: CPC A  G  H | IPC A  G  H

Claim 14:
15. An inductive sensing system for application to a body to be investigated, the inductive sensing system comprising:
a resonator circuit including a loop antenna and an electronic signal generator coupled to the antenna,
wherein the electronic signal generator is configured to emit a drive signal to drive the loop antenna,
wherein driving the loop antenna causes the loop antenna to generate electromagnetic signals,
wherein the resonator circuit has a resonance frequency, and
wherein the resonator circuit is configurable in a drive state in which the loop antenna is driven at resonance to generate electromagnetic signals for application to the body;

a switch connected in electrical parallel with the antenna, wherein the switch is configured to inhibit the drive state to permit switching of electromagnetic signal generation by at least one of interrupting and adjusting the electrical characteristics of at least one of the drive signal and the resonator circuit; and
a signal processor configured to:
detect, using the loop antenna, one or more electromagnetic signals returned from the body responsive to the one or more electromagnetic signals, wherein the detection of the one or more electromagnetic signals is based on detecting a variation of electrical characteristics of the resonator circuit over time, and
derive one or more sensing measurements.