Amplifier distortion management apparatus, systems, and methods
First Claim
Patent Images
1. An apparatus, including:
- an amplifier to produce an output signal and to receive an input signal including an adjustable phase to be adjusted in response to an indication of an amplitude of the output signal to reduce a phase distortion; and
a translation circuit to transform the indication of the amplitude into a control signal to adjust the adjustable phase, wherein the translation circuit is to provide a loop gain of less than about one.
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Abstract
An apparatus and a system, as well as a method and an article, may include detecting an indication of an amplifier output signal amplitude and responsively adjusting the amplifier input signal phase to reduce a change in the phase of the output signal.
63 Citations
21 Claims
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1. An apparatus, including:
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an amplifier to produce an output signal and to receive an input signal including an adjustable phase to be adjusted in response to an indication of an amplitude of the output signal to reduce a phase distortion; and a translation circuit to transform the indication of the amplitude into a control signal to adjust the adjustable phase, wherein the translation circuit is to provide a loop gain of less than about one. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus, including:
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a first stage including a first amplifier responsive to a first input signal; and a second stage coupled to the first stage, the second stage including a second amplifier responsive to a second input signal, wherein the second input signal includes an adjustable phase to be adjusted in response to an indication of an amplitude of an output signal to reduce a phase distortion, and wherein the first input signal includes an adjustable amplitude to be adjusted to reduce an amplitude distortion. - View Dependent Claims (7, 8)
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9. A system, including:
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an amplifier to produce an output signal and to receive an input signal including an adjustable phase to be adjusted in response to an indication of an amplitude of the output signal to reduce a phase distortion of the amplifier, wherein the adjustable phase is capable of being adjusted while leaving a signal amplitude associated with the amplifier substantially unchanged; and an omnidirectional antenna coupled to the amplifier. - View Dependent Claims (10, 11, 12)
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13. A method, including:
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detecting an indication of an amplitude of an output signal of an amplifier; and adjusting a phase of an input signal of the amplifier responsive to the indication to reduce a change in a phase of the output signal, wherein the indication is transformed into a control signal, and wherein a tuning element selected from a capacitor and an inductor is used to receive the control signal to adjust the adjustable phase. - View Dependent Claims (14, 15, 16, 17, 18)
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19. An apparatus, including:
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a first stage including a first amplifier responsive to a first input signal; a second stage coupled to the first stage, the second stage including a second amplifier responsive to a second input signal, wherein the second input signal includes an adjustable phase to be adjusted in response to an indication of an amplitude of an output signal to reduce a phase distortion, and wherein the first input signal includes an adjustable amplitude to be adjusted to reduce an amplitude distortion; a translinear circuit to be coupled to the second input signal and to the indication, and to adjust the adjustable phase; and a third stage including a third amplifier to provide the output signal, wherein the third stage is coupled to the second stage. - View Dependent Claims (20, 21)
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Specification