Power amplifier system having frequency and amplifier failure compensation
First Claim
1. A power amplifier system for use in amplifying an RF input signal exhibiting a given operating frequency within a known range of frequencies and comprising:
- a signal modulator that receives and modifies said input signal and provides therefrom a modified first signal;
a power amplifier that receives and amplifies said modified first signal;
a first power detector that detects said input signal and provides therefrom an average input power signal representative of the average input power thereof, and a second power detector connected to the output of said amplifier for providing an output average power signal representative of the average output power thereof;
a controller that adjusts the magnitude of said average input power signal and the magnitude of said average output power signal as a function of the frequency level of said operating frequency to produce an adjusted input average power signal and an adjusted output average power signal; and
, said controller includes a comparator that compares said adjusted input average power signal and said adjusted output average power signal and controls said modulator in accordance therewith.
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Accused Products
Abstract
A power amplifier system for use in amplifying an RF input signal exhibiting a given operating frequency within a known range of frequencies. The system includes a signal modulator that receives and modifies the input signal and provides therefrom a modified first signal. A power amplifier receives and amplifies the modified first signal. A first power detector detects the input signal and provides therefrom an average input power signal representative of the average input power thereof. A second power detector connected to the output of the amplifier provides an output average power signal representative of the average output power thereof. A controller adjusts the magnitude of said average input power signal and the magnitude of said average output power signal as a function of the operating frequency. The controller compares the adjusted said input average power signal and said adjusted output average power signal and controls said modulator in accordance therewith. Also, the amplifier includes a plurality of sub-amplifiers that are monitored for failure and adjustments are made to the average output power signal as needed.
135 Citations
26 Claims
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1. A power amplifier system for use in amplifying an RF input signal exhibiting a given operating frequency within a known range of frequencies and comprising:
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a signal modulator that receives and modifies said input signal and provides therefrom a modified first signal;
a power amplifier that receives and amplifies said modified first signal;
a first power detector that detects said input signal and provides therefrom an average input power signal representative of the average input power thereof, and a second power detector connected to the output of said amplifier for providing an output average power signal representative of the average output power thereof;
a controller that adjusts the magnitude of said average input power signal and the magnitude of said average output power signal as a function of the frequency level of said operating frequency to produce an adjusted input average power signal and an adjusted output average power signal; and
,said controller includes a comparator that compares said adjusted input average power signal and said adjusted output average power signal and controls said modulator in accordance therewith. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A power amplifier system for use in amplifying an RF input signal exhibiting a given operating frequency within a known range of frequencies and comprising:
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a signal modulator that receives control signals and modifies said input signal based on the control signals and provides therefrom a modified first signal;
a power amplifier that receives and amplifies said modified first signal;
a first power detector that detects said input signal and provides therefrom an average input power signal representative of the average input power thereof, and a second power detector connected to the output of said amplifier for providing an output average power signal representative of the average output power thereof;
a controller that adjusts the magnitude of said average input power signal and the magnitude of said average output power signal as a function of said operating frequency; and
,said controller includes an automatic gain control scheme that compares said adjusted input average power signal and said adjusted output average power signal and controls said modulator in accordance therewith.
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Specification