Power amplifier controller circuit
First Claim
1. A power amplifier controller circuit for controlling a power amplifier, the power amplifier coupled to receive and amplify an input signal to generate an output signal, the power amplifier controller circuit comprising:
- an amplitude control loop determining an amplitude correction signal indicative of an amplitude difference between an amplitude of the input signal and an attenuated amplitude of the output signal and adjusting a supply voltage or bias to the power amplifier based upon the amplitude correction signal; and
a phase control loop determining a phase error signal indicative of a phase difference between phases of the input signal and the output signal and adjusting the phase of the input signal to reduce phase distortion generated by the power amplifier.
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Accused Products
Abstract
A power amplifier controller circuit controls a power amplifier based upon an amplitude correction signal indicating the amplitude difference between the amplitude of the input signal and an attenuated amplitude of the output signal. The power amplifier controller circuit comprises an amplitude control loop and a phase control loop. The amplitude control loop adjusts the supply voltage to the power amplifier based upon the amplitude correction signal. The amplitude correction signal may also be split into two or more signals with different frequency ranges and provided respectively to different types of power supplies with different efficiencies to generate the adjusted supply voltage to the power amplifier. The phase control loop adjusts the phase of the input signal based upon a phase error signal indicating a phase difference between phases of the input signal and the output signal to reduce phase distortion generated by the power amplifier.
139 Citations
38 Claims
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1. A power amplifier controller circuit for controlling a power amplifier, the power amplifier coupled to receive and amplify an input signal to generate an output signal, the power amplifier controller circuit comprising:
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an amplitude control loop determining an amplitude correction signal indicative of an amplitude difference between an amplitude of the input signal and an attenuated amplitude of the output signal and adjusting a supply voltage or bias to the power amplifier based upon the amplitude correction signal; and
a phase control loop determining a phase error signal indicative of a phase difference between phases of the input signal and the output signal and adjusting the phase of the input signal to reduce phase distortion generated by the power amplifier. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A power amplifier controller circuit for controlling a power amplifier, the power amplifier coupled to receive and amplify an input signal to generate an output signal, the power amplifier controller circuit comprising:
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an amplitude comparator comparing an amplitude of the input signal with an attenuated amplitude of the output signal to generate an amplitude correction signal indicative of an amplitude difference between the amplitude of the input signal and the attenuated amplitude of the output signal;
a first power supply with a first efficiency, the first power supply coupled to the amplitude comparator and receiving a first portion of the amplitude correction signal in a first frequency range and generating a first adjusted supply output based upon the first portion of the amplitude correction signal; and
a second power supply with a second efficiency higher than the first efficiency, the second power supply coupled to the amplitude comparator and receiving a second portion of the amplitude correction signal in a second frequency range lower than the first frequency range and generating a second adjusted supply output based upon the second portion of the amplitude correction signal, a combination of the first adjusted supply output and the second adjusted supply output forming an adjusted supply voltage to the power amplifier. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A radio frequency (RF) power amplifier circuit, comprising:
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a power amplifier coupled to receive and amplify an RF input signal to generate an RF output signal; and
a power amplifier controller including;
an amplitude control loop determining an amplitude correction signal indicative of an amplitude difference between an amplitude of the RF input signal and an attenuated amplitude of the RF output signal and adjusting a supply voltage or bias to the power amplifier based upon the amplitude correction signal; and
a phase control loop determining a phase error signal indicative of a phase difference between phases of the RF input signal and the RF output signal and adjusting the phase of the RF input signal to reduce phase distortion generated by the power amplifier. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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28. A radio frequency (RF) power amplifier circuit, comprising:
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a power amplifier coupled to receive and amplify an RF input signal to generate an RF output signal; and
an amplitude comparator comparing an amplitude of the RF input signal with an attenuated amplitude of the RF output signal to generate an amplitude correction signal indicative of an amplitude difference between the amplitude of the RF input signal and the attenuated amplitude of the RF output signal;
a first power supply with a first efficiency, the first power supply coupled to the amplitude comparator and receiving a first portion of the amplitude correction signal in a first frequency range and generating a first adjusted supply output based upon the first portion of the amplitude correction signal; and
a second power supply with a second efficiency higher than the first efficiency, the second power supply coupled to the amplitude comparator and receiving a second portion of the amplitude correction signal in a second frequency range lower than the first frequency range and generating a second adjusted supply output based upon the second portion of the amplitude correction signal, a combination of the first adjusted supply output and the second adjusted supply output forming an adjusted supply voltage to the power amplifier. - View Dependent Claims (29, 30)
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31. A method of controlling a power amplifier receiving and amplifying an input signal to generate an output signal, the method comprising the steps of:
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comparing an amplitude of the input signal with an attenuated amplitude of the output signal to generate an amplitude correction signal indicative of an amplitude difference between the amplitude of the input signal and the attenuated amplitude of the output signal;
adjusting a supply voltage or bias to the power amplifier based upon the amplitude correction signal;
comparing a phase of the input signal with a phase of the output signal to generate a phase error signal; and
shifting the phase of the input signal to the power amplifier based upon the phase error signal. - View Dependent Claims (32, 33, 34)
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35. A method of controlling a radio frequency power amplifier receiving and amplifying an input signal to generate an output signal, the method comprising the steps of:
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comparing an amplitude of the input signal with an attenuated amplitude of the output signal to generate an amplitude correction signal indicative of an amplitude difference between the amplitude of the input signal and the attenuated amplitude of the output signal;
generating a first adjusted supply output based upon a first portion of the amplitude correction signal in a first frequency range;
generating a second adjusted supply output based upon a second portion of the amplitude correction signal in a second frequency range lower than the first frequency range; and
adjusting a supply voltage to the power amplifier based upon a combination of the first adjusted supply output and the second adjusted supply output. - View Dependent Claims (36)
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37. A power amplifier controller circuit for controlling a power amplifier, the power amplifier coupled to receive and amplify an input signal to generate an output signal, the power amplifier controller circuit comprising:
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means for determining an amplitude correction signal indicative of an amplitude difference between an amplitude of the input signal and an attenuated amplitude of the output signal and for adjusting a supply voltage or bias to the power amplifier based upon the amplitude correction signal; and
means for determining a phase error signal indicative of a phase difference between phases of the input signal and the output signal and for adjusting the phase of the input signal to the power amplifier to reduce phase distortion generated by the power amplifier.
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38. A power amplifier controller circuit for controlling a power amplifier, the power amplifier coupled to receive and amplify an input signal to generate an output signal, the power amplifier controller circuit comprising:
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comparison means for comparing an amplitude of the input signal with an attenuated amplitude of the output signal to generate an amplitude correction signal indicative of an amplitude difference between the amplitude of the input signal and the attenuated amplitude of the output signal;
first power supply means with a first efficiency, the first power supply means coupled to the comparison means and receiving a first portion of the amplitude correction signal in a first frequency range and generating a first adjusted supply output based upon the first portion of the amplitude correction signal; and
second power supply means with a second efficiency higher than the first efficiency, the second power supply means coupled to the comparison means and receiving a second portion of the amplitude correction signal in a second frequency range lower than the first frequency range and generating a second adjusted supply output based upon the second portion of the amplitude correction signal, a combination of the first adjusted supply output and the second adjusted supply output forming an adjusted supply voltage to the power amplifier.
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Specification