<p>A system and method are disclosed for implementing a power source including a power amplifier that generates a radio-frequency power signal with an adjustable operating frequency. The power amplifier also generates a reference phase signal that is derived from the radio-frequency power signal. An impedance match provides the radio-frequency power signal to a plasma coil that has a variable resonance condition. A phase probe is positioned adjacent to the plasma coil to generate a coil phase signal corresponding to the adjustable operating frequency. A phase-locked loop then generates an RF drive signal that is based upon a phase relationship between the reference phase signal and the coil phase signal. The phase-locked loop provides the RF drive signal to the power amplifier to control the adjustable operating frequency, so that the adjustable operating frequency then tracks the variable resonance condition.</p>
申请公布号
WO2007061879(A1)
申请公布日期
2007.05.31
申请号
WO2006US44752
申请日期
2006.11.16
申请人
THERMO FISHER SCIENTIFIC INC.;MATTABONI, PAUL, J.;MELLOR, ROBERT;FLETCHER, ROGER
发明人
MATTABONI, PAUL, J.;MELLOR, ROBERT;FLETCHER, ROGER