Power amplifier with back-off efficiency
First Claim
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1. A non-drain bias power amplifier system, comprising:
- a signal path including driver stages and output stage,a power control element with one or more power control ports and uses one or more nonlinear control characteristics; and
a nonlinear control curve generator driven by at least one of, an input power control signal, a voltage or current saturation sensing signal and a sensed or estimated output power signal, the non-linear control curve generator driving one or more of inputs of the output stage and the driver stages.
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Abstract
A power amplifier system is provided with a signal path including driver stages and output stages. A power control element has one or more control ports and uses one or more nonlinear control characteristics.
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Citations
18 Claims
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1. A non-drain bias power amplifier system, comprising:
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a signal path including driver stages and output stage, a power control element with one or more power control ports and uses one or more nonlinear control characteristics; and a nonlinear control curve generator driven by at least one of, an input power control signal, a voltage or current saturation sensing signal and a sensed or estimated output power signal, the non-linear control curve generator driving one or more of inputs of the output stage and the driver stages. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A non-drain power amplifier system, comprising:
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a signal path including driver stages and an output stage; and a power control element that uses amplitude and pulse-width modulation to change a power amplifier output power level. - View Dependent Claims (17, 18)
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Specification