MULTIMODE POWER AMPLIFIER WITH PREDISTORTION
First Claim
1. A device comprising:
- a drain bias controller to receive an envelope signal associated with an input signal and to adjust a drain bias based on the received envelope signal;
a predistortion controller to predistort the input signal, based on the received envelope signal and based on the adjusted drain bias, and to output the predistorted signal; and
an amplifier to receive the predistorted signal and to generate an amplified output signal from the predistorted signal, where the adjusted drain bias is associated with the amplifier.
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Accused Products
Abstract
A device may include an envelope detector to generate an envelope signal from the input signal, a drain bias controller to adjust a drain bias of the amplifier based on the envelope signal, a gate bias controller to adjust a gate bias of the amplifier based on the envelope signal, a predistortion controller to predistort the input signal based on the envelope signal, based on the adjusted drain bias, and based on the adjusted gate bias, and to output the predistorted signal, and an amplifier to receive the predistorted signal and to generate an amplified output signal from the predistorted signal. The device may be selectable to operate in a linear mode or a nonlinear mode. The nonlinear mode may be selected by applying a large gate offset bias.
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Citations
20 Claims
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1. A device comprising:
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a drain bias controller to receive an envelope signal associated with an input signal and to adjust a drain bias based on the received envelope signal; a predistortion controller to predistort the input signal, based on the received envelope signal and based on the adjusted drain bias, and to output the predistorted signal; and an amplifier to receive the predistorted signal and to generate an amplified output signal from the predistorted signal, where the adjusted drain bias is associated with the amplifier. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 17, 18, 19)
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13. A method performed by an electronic device, comprising:
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receiving, using a communication interface of the electronic device, an input signal; receiving, using the communication interface, an envelope signal associated with the received input signal; adjusting, using the communication interface, a drain bias voltage of an amplifier associated with the communication interface, based on the envelope signal; generating, using the communication interface, a predistortion signal from the received input signal, based on the envelope signal and based on the adjusted drain bias voltage; amplifying, using the amplifier, the predistortion signal; and transmitting, using the communication interface, the amplified predistortion signal. - View Dependent Claims (14, 15, 16)
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20. A system comprising:
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means for receiving an input signal; means for determining an envelope signal based on the received input signal; means for adjusting a drain bias voltage based on the envelope signal; means for adjusting a gate bias voltage based on the envelope signal; means for generating a predistortion signal from the received input signal, based on the envelope signal, based on the adjusted drain bias voltage, and based on the adjusted gate bias voltage; means for amplifying the predistortion signal; means for selecting whether the means for amplifying is to operate in a linear or a nonlinear mode by providing an offset via the means for adjusting the gate bias voltage; and means for transmitting the amplified predistortion signal.
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Specification