Power amplifier system having amplifier failure compensation
First Claim
1. A power amplifier system for use in amplifying an RF input signal comprising:
- a signal modulator that receives and modifies said input signal and provides therefrom a modified input signal;
M sub-power amplifiers connected together in parallel with each receiving and amplifying a portion of said modified input signal;
a combiner that combines said amplified portions of said modified input signal to provide a combined output signal;
a power detector that receives said combined output signal and provides therefrom an average output power signal representative of the average output power thereof;
a controller that monitors the operation of said M sub-amplifiers to determine if any have failed and adjusts the magnitude of said output power signal to compensate for any such failure and wherein said controller controls said modulator in accordance with a function of the magnitude of said output power signal.
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Accused Products
Abstract
In accordance with one aspect of the present invention, a power amplifier system is provided for amplifying an RF input signal. The system includes a signal modulator that receives and modifies an input signal and provides therefrom a modified input signal. The system further includes a plurality of M sub-power amplifiers connected together in parallel with each receiving and amplifying a portion of the modified input signal. A combiner combines the amplified portions to provide a combined output signal. A power detector receives the combined output signal and provides therefrom an average output power signal representative of the average output power thereof. A controller monitors the operation of the M sub-power amplifiers to determine if any have failed and adjusts the magnitude of the output power signal to compensate for any failure. The controller controls the modulator in accordance with a function of the magnitude of the output power signal.
92 Citations
13 Claims
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1. A power amplifier system for use in amplifying an RF input signal comprising:
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a signal modulator that receives and modifies said input signal and provides therefrom a modified input signal;
M sub-power amplifiers connected together in parallel with each receiving and amplifying a portion of said modified input signal;
a combiner that combines said amplified portions of said modified input signal to provide a combined output signal;
a power detector that receives said combined output signal and provides therefrom an average output power signal representative of the average output power thereof;
a controller that monitors the operation of said M sub-amplifiers to determine if any have failed and adjusts the magnitude of said output power signal to compensate for any such failure and wherein said controller controls said modulator in accordance with a function of the magnitude of said output power signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification