发明名称 |
System and method for automatic tuning of a magnetic field generator |
摘要 |
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. In an embodiment of the invention, the variable capacitor is in the form of a diode variable capacitor (varicap) in parallel circuit relationship with the tuned circuit capacitor and the inductor. In an alternate embodiment the inductor and a fixed capacitor are in series circuit relationship with the varicap in parallel circuit relationship with the fixed 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 voltage as control parameters.
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申请公布号 |
US7515012(B2) |
申请公布日期 |
2009.04.07 |
申请号 |
US20060360307 |
申请日期 |
2006.02.22 |
申请人 |
ALFRED E. MANN FOUNDATION FOR SCIENTIFIC RESEARCH |
发明人 |
SCHULMAN JOSEPH H.;LEWIS DALE A.;HANCOCK DONALD J.;VOGEL, LEGAL REPRESENTATIVE ADAM |
分类号 |
H03G11/04;A61N1/08;A61N2/02 |
主分类号 |
H03G11/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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