Absolute power detector
OwnerTimothy J. Dupuis, David R. Welland +2inventors
InventorsTimothy J. Dupuis, David R. Welland, Susanne A. Paul, Ali M. Niknejad
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Abstract
A method and apparatus is provided for detecting the output power of a power amplifier. The output power is detected by detecting the absolute values of the voltage and current at the output of the amplifier and mixing the detected voltage and current to generate a signal related to the output power.
Claims40
A power detector for detecting the output of a power amplifier comprising:
- a voltage sensor coupled to the power amplifier for sensing the voltage provided to the output of the power amplifier;
- a first envelope detector coupled to the voltage sensor;
- a current sensor coupled to the power amplifier for sensing the current provided to the output of the power amplifier;
- a second envelope detector coupled to the current sensor;
- a mixer coupled to first and second envelope detectors for generating an output signal from the sensed voltage and sensed current that is related to the output power of the power amplifier.
A method of detecting the output power of a power amplifier comprising the steps of:
- sensing the magnitude of the voltage at the output of the power amplifier;
- sensing the magnitude of the current at the output of the power amplifier;
- and
- generating a signal using the sensed output voltage and sensed output current, wherein
- the generated signal is proportional to the output power of the power amplifier.
A method of controlling the output power of an RF power amplifier comprising the steps of:
- generating a first signal that is proportional to the magnitude of the voltage at the output of the RF power amplifier;
- generating a second signal that is proportional to the magnitude of the current at the output of the RF power amplifier;
- generating a power control signal based on the first and second signals;
- and
- using the power control signal to control the output power of the RF power amplifier.
A method of detecting the output power of a power amplifier comprising the steps of:
- sensing the magnitude of the voltage at the output of the amplifier;
- sensing the magnitude of the current at the output of the amplifier;
- and
- determining the output power of the power amplifier based on the sensed magnitude of the voltage and the sensed magnitude of the current.
Dependencies are inferred from the claim text.