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US 7,119,621 B2Granted
Power amplifier
AssigneeNtt Docomo, Inc.
InventorsNing Chen, Yasunori Suzuki, Tetsuo Hirota, Yasushi Yamao
Life of this patent
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AssigneeNtt Docomo, Inc.
InventorsNing Chen, Yasunori Suzuki, Tetsuo Hirota, Yasushi Yamao
Estimating the term…
A power amplifier for receiving and amplifying an input signal and outputting an output signal includes N power amplifying units (N is an integer larger than 1) connected in parallel so as to output amplified signals in response to the input signal; an output combining unit for combining the output signals from the N power amplifying units and outputting a combined signal as the output signal of the power amplifier; and an amplitude controlling unit for selectively turning ON each of the N power amplifying units based on an amplitude of the input signal. In the power amplifier, the amplitude controlling unit may includes N amplitude adjusters connected in parallel for adjusting the amplitude of the input signal of the power amplifier; and a controller for selectively turning ON each of the N power amplifying units and controlling the amplitude adjusters so that an amplitude of the output signal becomes a substantially continuous function with respect to the amplitude of the input signal.
A power amplifier for receiving and amplifying an input signal and outputting an output signal, comprising:
Dependencies are inferred from the claim text.