Method and apparatus for controlling a supply voltage to a power amplifier
AssigneeMotorola, Inc.
InventorsJames Mitzlaff, Patrick Mathes, Rodney Hagen
Life of this patent
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Abstract
A supply voltage to a power amplifier is controlled. A signal at a single point in a power amplifier is detected. A signal parameter is determined for the detected signal. The signal parameter is compared to at least one predetermined limit. This comparison result is used to determine whether to adjust a supply voltage to the power amplifier. The signal parameter is, for example, an average power or a peak-to-average power ratio.
Claims20
A method for controlling a supply voltage to a power amplifier comprising the steps of:
- detecting a signal at a single point in a power amplifier to produce a detected signal;
- determining a first signal parameter based on the detected signal;
- comparing the first signal parameter to at least one predetermined limit to generate a comparison result;
- and
- determining whether to adjust a supply voltage to the power amplifier based on the comparison result.
An apparatus for controlling a supply voltage to a power amplifier comprising:
- a processor that:
- detects a signal at a single point in a power amplifier to produce a detected signal;
- determines a first signal parameter based on the detected signal;
- compares the first signal parameter to at least one predetermined limit to generate a comparison result;
- and
- determines whether to adjust a supply voltage to the power amplifier based on the comparison result.
A transmitter comprising:
- a power amplifier;
- a radio frequency mixer circuit coupled to the input of the power amplifier;
- a baseband circuit with an output coupled to an input of the radio frequency mixer circuit;
- and
- a processor coupled to the output of the baseband circuit, wherein the processor:
- detects a signal at a single point in a power amplifier to produce a detected signal;
- determines a first signal parameter based on the detected signal;
- compares the first signal parameter to at least one predetermined limit to generate a comparison result;
- and
- determines whether to adjust a supply voltage to the power amplifier based on the comparison result.
Dependencies are inferred from the claim text.