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US 2026/0128715 A1Published application
Closed loop power control
AssigneeQorvo US, Inc.
InventorSøren Deleuran Laursen
Life of this patent
Estimating the term…
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.
Claims14
A control system, comprising:
- a detector circuit connected to an output of a 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;
- an amplifier circuit configured to output a bias control voltage dependent upon a voltage input to the control system, and the detector signal;
- 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 detected to be in an early saturation state by adjusting a voltage output from the first bias circuit;
- 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 detected to be in a saturation state;
- and
- a saturation correction circuit, operable to:
- when the power amplifier is detected to be in the early saturation state, cause flow of current from the voltage output from the first bias circuit to pass through a resistor to increase the detector signal when the voltage output from the first bias circuit exceeds a threshold voltage set based on the bias control voltage and a power supply voltage for control system;
- and
- when the power amplifier is detected to be in the saturation state, cause flow of current from the voltage output from the first bias circuit to increase the detector signal without passing through the resistor, when the voltage output from the first bias circuit exceeds a second, higher, threshold based on the bias control voltage.
6 more elements
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;
- an amplifier circuit configured to output a bias control voltage dependent upon a voltage input to the control system, and the detector signal;
- a first bias circuit connected to the power amplifier, the first bias circuit operable to provide a first additional bias to the power amplifier when the power amplifier is detected to be in an early saturation state by adjusting a voltage output from the first bias circuit;
- a second bias circuit connected to the power amplifier, the second bias circuit operable to provide a second additional bias to the power amplifier when the power amplifier is detected to be in a saturation state;
- and
- a saturation correction circuit, operable to:
- when the power amplifier is detected to be in the early saturation state, cause flow of current from the voltage output from the first bias circuit to pass through a resistor to increase the detector signal when the voltage output from the first bias circuit exceeds a threshold voltage set based on the bias control voltage and a power supply voltage for the control system;
- and
- when the power amplifier is detected to be in the saturation state, cause flow of current from the voltage output from the first bias circuit to increase the detector signal without passing through the resistor, when the voltage output from the first bias circuit exceeds a second, higher, threshold based on the bias control voltage.
10 more elements
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;
- providing the detector signal as a feedback signal to an amplifier circuit that generates a bias control voltage based on the detector signal and a voltage input to the control system;
- 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;
- wherein:
- when the power amplifier is detected to be in the early saturation state, causing flow of current from the voltage output from the first bias circuit to pass through a resistor to increase the detector signal when the voltage output from the first bias circuit exceeds a threshold voltage set based on the bias control voltage and a power supply voltage for control system;
- and
- when the power amplifier is detected to be in the saturation state, causing flow of current from the voltage output from the first bias circuit to increase the detector signal without passing through the resistor, when the voltage output from the first bias circuit exceeds a second, higher, threshold based on the bias control voltage.
7 more elements
Dependencies are inferred from the claim text.