Compression control through power amplifier load adjustment
First Claim
1. A power amplifier module comprising:
- a power amplifier including a cascode transistor pair, the cascode transistor pair including a first transistor and a second transistor;
a power amplifier bias controller including a current comparator configured to compare a first base current of the first transistor and a second base current of the second transistor to obtain a comparison value; and
a saturation controller configured to supply a reference signal to an impedance matching network based on the comparison value, the impedance matching network being configured to modify a load impedance of a load line in electrical communication with the power amplifier based at least in part on the reference signal.
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Accused Products
Abstract
Compression control through power amplifier load adjustment. A power amplifier module can include a power amplifier including a cascode transistor pair. The cascode transistor pair can include a first transistor and a second transistor. The power amplifier module can include a power amplifier bias controller including a current comparator configured to compare a first base current of the first transistor and a second base current of the second transistor to obtain a comparison value. The power amplifier module can include a saturation controller configured to supply a reference signal to an impedance matching network based on the comparison value. The impedance matching network can be configured to modify a load impedance of a load line in electrical communication with the power amplifier based at least in part on the reference signal.
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Citations
20 Claims
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1. A power amplifier module comprising:
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a power amplifier including a cascode transistor pair, the cascode transistor pair including a first transistor and a second transistor; a power amplifier bias controller including a current comparator configured to compare a first base current of the first transistor and a second base current of the second transistor to obtain a comparison value; and a saturation controller configured to supply a reference signal to an impedance matching network based on the comparison value, the impedance matching network being configured to modify a load impedance of a load line in electrical communication with the power amplifier based at least in part on the reference signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A transceiver comprising:
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an impedance matching network configured to modify, based on a reference signal, a load impedance of a load line in electrical communication with a power amplifier and an antenna; and a power amplifier module including the power amplifier, a power amplifier bias controller, and a saturation controller, the power amplifier including a cascode transistor pair, the cascode transistor pair including a first transistor and a second transistor, the power amplifier bias controller including a current comparator configured to compare a base current of the first transistor and a base current of the second transistor to obtain a comparison value, the saturation controller being configured to generate the reference signal based at least in part on the comparison value and to provide the reference signal to the impedance matching network. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A wireless device comprising:
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an antenna configured to at least transmit a signal from a transceiver, the signal being based at least in part on a radio frequency input signal supplied to a power amplifier of the transceiver; and the transceiver including an impedance matching network and a power amplifier module, the impedance matching network being configured to modify, based on a reference signal, a load impedance of a load line in electrical communication with the power amplifier and the antenna, the power amplifier module including the power amplifier, a power amplifier bias controller, and a saturation controller, the power amplifier including a cascode transistor pair, the cascode transistor pair including a first transistor and a second transistor, the power amplifier bias controller including a current comparator configured to compare a base current of the first transistor and a base current of the second transistor to obtain a comparison value, the saturation controller being configured to generate the reference signal based at least in part on the comparison value and to provide the reference signal to the impedance matching network.
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Specification