Power control for a switching mode power amplifier
First Claim
1. A power control structure comprising:
- a switching mode power amplifier for receiving an input signal, for amplifying said received input signal and for providing said amplified signal as output signal;
a first control arrangement for controlling the power level of said output signal at least at higher power levels desired for said output signal by adjusting a power supply provided to said switching mode power amplifier; and
a second control arrangement for controlling the power level of said output signal at least at lower power levels desired for said output signal by adjusting the power of said input signal before it is provided to said switching mode power amplifier.
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Accused Products
Abstract
The invention relates to a power control structure comprising a switching mode power amplifier for receiving an input signal, for amplifying the received input signal and for providing the amplified signal as output signal. In order to enable a power control over a large range while preserving the efficiency of the power amplifier, the structure further comprises a first control arrangement for controlling the power level of the output signal at least at higher desired power levels by adjusting a power supply provided to the switching mode power amplifier, and in addition a second control arrangement for controlling the power level of the output signal at least at lower desired power levels by adjusting the power of the input signal before it is provided to the switching mode power amplifier. The invention relates equally to a corresponding method.
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Citations
21 Claims
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1. A power control structure comprising:
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a switching mode power amplifier for receiving an input signal, for amplifying said received input signal and for providing said amplified signal as output signal;
a first control arrangement for controlling the power level of said output signal at least at higher power levels desired for said output signal by adjusting a power supply provided to said switching mode power amplifier; and
a second control arrangement for controlling the power level of said output signal at least at lower power levels desired for said output signal by adjusting the power of said input signal before it is provided to said switching mode power amplifier. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of controlling at least a power level of an output signal of a switching mode power amplifier, which switching mode power amplifier receives an input signal, amplifies said received input signal and provides said amplified signal as output signal, said method comprising:
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controlling the power level of said output signal by adjusting a power supply provided to said switching mode power amplifier at least when higher power levels are desired for said output signal; and
controlling the power level of said output signal by adjusting the power of said input signal before it is provided to said switching mode power amplifier at least when lower power levels are desired for said output signal. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification