RF power amplifier controlled by estimated distortion level of output signal of power amplifier
AssigneeQuantance, Inc.
InventorsVikas Vinayak, Serge Francois Drogi, Martin Tomasz
Life of this patent
Estimating the term…
Abstract
A radio frequency (RF) power amplifier system is provided, in which a distortion of the RF output signal from the power amplifier is estimated by comparing the RF output signal with reference modulation information. The supply voltage to the power amplifier is adjusted so that the estimated distortion of the RF output signal corresponds to a predetermined distortion level. The predetermined distortion level is set to represent an acceptable distortion level at the RF output signal.
Claims25
A radio frequency (RF) power amplifier system, comprising:
- a power amplifier coupled to receive and amplify an RF input signal to generate an RF output signal;
- and
- a power amplifier controller coupled to the power amplifier for controlling a supply voltage to the power amplifier based upon a supply voltage control signal representing a difference between an estimated distortion level of the RF output signal and a predetermined distortion level,
- the estimated distortion level determined from a comparison of detected amplitude and phase modulation of the RF output signal with reference modulation information including desired amplitude and phase modulation of the RF output signal, and
- the predetermined distortion level corresponding to an allowable distortion level in the RF output signal.
A radio frequency (RF) power amplifier system, comprising:
- a power amplifier coupled to receive and amplify an RF input signal to generate an RF output signal;
- and
- a power amplifier controller coupled to the power amplifier for controlling a supply voltage to the power amplifier based upon a supply voltage control signal representing a difference between an estimated distortion level of the RF output signal and a predetermined distortion level,
- the estimated distortion level determined from a comparison of detected amplitude of the RF output signal with reference modulation amplitude information corresponding to a desired amplitude of the RF output signal, and
- the predetermined distortion level corresponding to an allowable distortion level in the RF output signal.
In a radio frequency (RF) power amplifier system, a method of controlling a power amplifier receiving and amplifying an RF input signal to generate an RF output signal, the method comprising:
- comparing detected amplitude and phase modulation of the RF output signal with reference modulation information including desired amplitude and phase modulation of the RF output signal to determine an estimated distortion level of the RF output signal;
- comparing the estimated distortion level with a predetermined distortion level corresponding to an allowable distortion level in the RF output signal;
- and
- controlling a supply voltage to the power amplifier based upon a difference between the estimated distortion level and the predetermined distortion level.
In a radio frequency (RF) power amplifier system, a method of controlling a power amplifier receiving and amplifying an RF input signal to generate an RF output signal, the method comprising:
- comparing detected amplitude of the RF output signal with reference modulation amplitude information to determine an estimated distortion level of the RF output signal;
- comparing the estimated distortion level with a predetermined distortion level corresponding to an allowable distortion level in the RF output signal;
- and
- controlling a supply voltage to the power amplifier based upon a difference between the estimated distortion level and the predetermined distortion level.
Dependencies are inferred from the claim text.