Closed loop power control
AssigneeQorvo US, Inc.
InventorSøren Deleuran Laursen
Life of this patent
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Abstract
A control system is configured to control an output power of a power amplifier. The control system is operable to detect when the power amplifier is in first state and responsively provide first additional bias to the power amplifier. The first additional bias assists or enables the power amplifier in increasing the output power. The control system is also operable to detect when the power amplifier is in a second state and responsively provide second additional bias to the power amplifier. The second additional bias assists or enables the power amplifier in increasing the amount of output power.
Claims20
A control system, comprising:
- a detector circuit connected to an output of the power amplifier, the detector circuit operable to detect a reverse voltage and output a detector signal that provides an indication of a state of the power amplifier;
- a first bias circuit connected to the power amplifier, the first bias circuit operable to provide first additional bias to the power amplifier when the power amplifier is in an early saturation state;
- and
- a second bias circuit connected to the power amplifier, the second bias circuit operable to provide second additional bias to the power amplifier when the power amplifier is in a saturation state.
A radio frequency (RF) system, comprising:
- RF input circuitry connected to a power amplifier;
- RF output circuitry connected to the power amplifier;
- and
- a control system, comprising:
- a detector circuit connected to an output of the power amplifier, the detector circuit operable to detect a reverse voltage and output a detector signal that provides an indication of a state of the power amplifier;
- a first bias circuit connected to the power amplifier, the first bias circuit operable to provide first additional bias to the power amplifier when the power amplifier is in an early saturation state;
- and
- a second bias circuit connected to the power amplifier, the second bias circuit operable to provide second additional bias to the power amplifier when the power amplifier is in an saturation state.
A method of operating a control system in an electronic device, the method comprising:
- determining a power amplifier is in an early saturation state based on a first signal level of a detector signal that is output from a detector circuit connected to an output of the power amplifier, the detector circuit operable to detect a forward voltage and a reverse voltage;
- based on determining the power amplifier is in the early saturation state, providing first additional bias to the power amplifier;
- determining the power amplifier is in a saturation state based on detecting a second signal level of the detector signal, wherein the second signal level is greater than the first signal level;
- and
- based on determining the power amplifier is in the saturation state, providing second additional bias to the power amplifier.
Dependencies are inferred from the claim text.