Compression control of cascode power amplifiers
First Claim
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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 current comparator configured to compare a first base current of the first transistor and a second base current of the second transistor to generate a comparison signal; and
a saturation controller configured to maintain the power amplifier out of saturation based on the comparison signal.
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Abstract
Compression control of cascode power amplifiers. 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 current comparator configured to compare a first base current of the first transistor and a second base current of the second transistor to generate a comparison signal. The power amplifier module can include a saturation controller configured to maintain the power amplifier out of saturation based on the comparison 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 current comparator configured to compare a first base current of the first transistor and a second base current of the second transistor to generate a comparison signal; and a saturation controller configured to maintain the power amplifier out of saturation based on the comparison signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of maintaining a power amplifier out of saturation, the method comprising:
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comparing a first base current of a first transistor of a cascode power amplifier and a second base current of a second transistor of the cascode power amplifier; and maintaining the cascode power amplifier out of saturation by modifying an operating characteristic of the cascode power amplifier based on the comparison, the operating characteristic including a supply voltage provided to the cascode power amplifier, an amplitude of an RF input signal supplied to the cascode power amplifier, or a load impedance of a load line in electrical communication with the cascode power amplifier. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A wireless device comprising:
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a transceiver configured to generate an RF input signal; a power amplifier module including a power amplifier, a current comparator, and a saturation controller, the power amplifier being configured to amplify the RF input signal to generate an RF output signal, the power amplifier including a cascode transistor pair, the cascode transistor pair including a first transistor and a second transistor, the current comparator being configured to compare a first base current of the first transistor and a second base current of the second transistor to generate a comparison signal, the saturation controller configured to maintain the power amplifier out of saturation based on the comparison signal; and an antenna in communication with the power amplifier module, the antenna configured to transmit the RF output signal. - View Dependent Claims (20)
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Specification