Distortion Correction Based Feedforward Control Systems and Methods For Radio Frequency Power Sources
First Claim
1. A distortion module comprising:
- a first module configured to (i) receive radio frequency signals from radio frequency sensors of a power amplifier, and (ii) generate a distortion signal indicating distortion values for the radio frequency signals, wherein the radio frequency signals are indicative of radio frequency power out of the power amplifier and received by a transmission line;
at least one module configured to estimate a phase of the distortion signal, wherein the phase of the distortion signal is indicative of a phase of the transmission line; and
a correction module configured to generate a distortion correction signal based on the phase to correct at least one of the distortion values of the radio frequency signals.
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Abstract
A distortion module includes a first module, at least one module and a correction module. The first module is configured to (i) receive radio frequency signals from radio frequency sensors of a power amplifier, and (ii) generate a distortion signal indicating distortion values for the radio frequency signals. The radio frequency signals are indicative of radio frequency power out of the power amplifier and received by a transmission line. At least one module is configured to estimate a phase of the distortion signal. The phase of the distortion signal is indicative of a phase of the transmission line. The correction module is configured to generate a distortion correction signal based on the phase to correct at least one of the distortion values of the radio frequency signals.
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Citations
22 Claims
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1. A distortion module comprising:
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a first module configured to (i) receive radio frequency signals from radio frequency sensors of a power amplifier, and (ii) generate a distortion signal indicating distortion values for the radio frequency signals, wherein the radio frequency signals are indicative of radio frequency power out of the power amplifier and received by a transmission line; at least one module configured to estimate a phase of the distortion signal, wherein the phase of the distortion signal is indicative of a phase of the transmission line; and a correction module configured to generate a distortion correction signal based on the phase to correct at least one of the distortion values of the radio frequency signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A distortion module comprising:
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a function module configured to (i) receive radio frequency signals from radio frequency sensors of a power amplifier, and (ii) generate a distortion signal indicating distortion values for the radio frequency signals based on a distortion function; a first derivative module configured to, based on the distortion values of the distortion signal, determine first derivative values of a first derivative of the distortion function or the distortion signal to generate a first derivative signal; a second derivative module configured to, based on the first derivative values or the first derivative signal, determine second derivative values of a second derivative of the distortion signal to generate a second derivative signal; a phase module configured to (i) determine a first phase of the first derivative signal and a second phase of the second derivative signal, and (ii) determine a first phase correction value based on the first phase and the second phase; and a correction module configured to generate a distortion correction signal based on the first phase correction value. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A radio frequency system comprising:
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a power amplifier configured to output a radio frequency signal to a matching network via a transmission line between the power amplifier and the matching network; a sensor configured to monitor the radio frequency signal and generate first sensor signals based on the radio frequency signal; a distortion module configured to determine distortion values according to at least one of (i) a sinusoidal function of the first sensor signals and (ii) a cross-correlation function of the first sensor signals; a derivative module configured to determine derivative values for a derivative of a distortion function based on the distortion values; a gain module configured to determine a gain value based on the derivative values to account for a resolution of an impedance tune space associated with the transmission line; and a control module configured to (i) generate an impedance tuning value based on the distortion values and the gain value, and (ii) provide feedforward control of impedance matching performed within the matching network including outputting the impedance tuning value to one of the power amplifier and the matching network. - View Dependent Claims (21, 22)
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Specification