Wave transmission lines and networks – Automatically controlled systems
Reexamination Certificate
2006-03-21
2006-03-21
Summons, Barbara (Department: 2817)
Wave transmission lines and networks
Automatically controlled systems
C607S002000, C607S060000, C607S065000, C607S155000
Reexamination Certificate
active
07015769
ABSTRACT:
An automatic tuning system for a magnetic field generating tuned circuit includes a processor configured to maintain the resonant frequency of a tuned circuit equal to a reference frequency. The tuned circuit is driven by a power amplifier whose output provides an amplified signal at the reference frequency. The tuned circuit includes a magnetic field generating inductor and a bank of individually switchable capacitors controlled by the processor capable of adding and removing the respective capacitances to and from the tuned circuit. The inductor includes a Faraday shield to shield the tuned circuit from the influence of electric fields. A power sense circuit monitors the power delivered by the power amplifier to the tuned circuit and the processor sequentially switches the capacitors in a binary progression format to achieve maximum power delivery indicative of conforming the resonant frequency of the tuned circuit to the reference frequency. In an alternate embodiment of the invention, the inductor includes a plurality of taps that provide individually selectable inductance values available for use in the process of conforming the resonant frequency of the tuned circuit to the reference frequency. In further alternate embodiments, the variable capacitor is in the form of a motor driven variable capacitor and the tuning sequence relies on a phase locked loop using the phase of a reference frequency signal and the phase of the inductor current as control parameters.
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Arcos-Burgos Maria-Isabel
Cosendai Gregoire
Gord John
Schulman Joseph H.
Alfred E. Mann Foundation for Scientific Research
Romano Malcolm J.
Summons Barbara
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