Radio Frequency (RF) Envelope Pulsing Using Phase Switching of Switch-Mode Power Amplifiers
First Claim
Patent Images
1. A radio frequency (RF) power generator, comprising:
- a first switch-mode amplifier that generates a first RF signal in accordance with a first control signal; and
a second switch-mode amplifier that generates a second RF signal in accordance with a second control signal, wherein the first and second control signals determine a phase difference between the first and second RF signals and wherein an output signal envelope is based on the first and second RF signals and the phase difference, wherein the first control and second control signals alternate phases of the first and second RF signals.
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Abstract
A radio frequency (RF) power generator includes a first switch-mode amplifier that generates a first RF signal in accordance with a first control signal and a second switch-mode amplifier that generates a second RF signal in accordance with a second control signal. The first and second control signals determine a phase difference between the first and second RF signals. An output signal envelope is based on the first and second RF signals and the phase difference. The first control and second control signals alternate phases of the first and second RF signals.
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Citations
18 Claims
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1. A radio frequency (RF) power generator, comprising:
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a first switch-mode amplifier that generates a first RF signal in accordance with a first control signal; and a second switch-mode amplifier that generates a second RF signal in accordance with a second control signal, wherein the first and second control signals determine a phase difference between the first and second RF signals and wherein an output signal envelope is based on the first and second RF signals and the phase difference, wherein the first control and second control signals alternate phases of the first and second RF signals. - View Dependent Claims (2, 3, 4, 5)
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- 6. The RF power generator of claim 6 wherein the Class D amplifiers comprise respective inductive-capacitance (LC) circuits.
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9. A method of operating a radio frequency (RF) power generator, comprising:
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generating a first RF signal that includes a first phase in accordance with a first control signal; generating a second RF signal that includes a second phase in accordance with a second control signal; applying the first and second RF signals across a load; varying the first and second control signals to control an RF envelope that is applied to the load via the first and second RF signals; and alternating phases of the first and second RF signals. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A radio frequency (RF) power generator, comprising:
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a first Class E amplifier that generates a first RF signal in accordance with a first control signal; and a second Class E amplifier that generates a second RF signal in accordance with a second control signal, wherein the first and second control signals alternate phases of the first and second RF signals while holding a constant phase difference between the first and RF signals during each phase alternation and wherein an output signal envelope is based on the first and second RF signals and the phase difference. - View Dependent Claims (18)
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Specification