Patent ID: 7423496

Claim:
A resonator system for detecting a deliverable device in a body, comprising: a resonator device with an LC resonator circuit, including: an inductor coil a plurality of individually switched parallel capacitors in series with the inductor coil; a varactor in parallel with the plurality of individually switched parallel capacitors; a processor coupled to the plurality of individually switched parallel capacitors; a magnetic flux sensor coupled to the processor, where the magnetic flux sensor can sense a flux of a magnetic field and transmit a signal that represents the flux to the processor that changes the capacitance of the LC resonator circuit by switching a number of the plurality of individually switched parallel capacitors based on the signal; a power source electrically connected to the processor; and a deliverable device, positioned with the resonator device, so that at least a portion of the inductor coil surrounds a space that is surrounded by at least a portion of the deliverable device.