Amplitude error de-glitching circuit and method of operating
AssigneeQuantance, Inc.
InventorsSerge Drogi, Vikas Vinayak, Martin Tomasz
Life of this patent
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Abstract
A power amplifier controller circuit controls a power amplifier based upon an amplitude correction signal indicating the amplitude difference between the amplitude of the input signal and an attenuated amplitude of the output signal. The power amplifier controller circuit comprises an amplitude control loop and a phase control loop. The amplitude control loop adjusts the supply voltage to the power amplifier based upon the amplitude correction signal. The RF power amplifier system may reduce the corrective action of the amplitude loop during periods of relatively rapid changes in amplitude, and thus distortion can be further reduced.
Claims35
An RF power amplifier system, comprising:
- an RF power amplifier configured to receive and amplify an input signal to generate an output signal;
- and
- an amplitude control loop to determine an amplitude correction signal indicative of an amplitude difference between an amplitude of the input signal and an attenuated amplitude of the output signal, and to adjust a supply voltage or bias to the power amplifier based upon the amplitude correction signal;
- where the amplitude control loop is configured to reduce an action of the amplitude control loop during rapid amplitude changes in the input signal.
An RF power amplifier system, comprising:
- an RF amplifier configured to receive and amplify an input signal to generate an output signal;
- an amplitude control loop configured to determine an amplitude correction signal indicative of an amplitude difference between an amplitude of the input signal and an attenuated amplitude of the output signal;
- and
- an amplitude limiting circuit configured to limit an amplitude of the amplitude correction signal if the magnitude of the amplitude correction signal exceeds a threshold to generate an adjusted amplitude correction signal;
- where the amplitude control loop is configured to adjust a supply voltage or bias to the RF amplifier based upon the adjusted amplitude correction signal.
A method of controlling an RF power amplifier coupled to receive and amplify an input signal to generate an output signal, the method comprising:
- generating an amplitude correction signal indicative of an amplitude difference between an amplitude of the input signal and an attenuated amplitude of the output signal in an amplitude control loop;
- reducing an action of an amplitude control loop during rapid amplitude changes in the input signal;
- and
- adjusting a supply voltage or bias to the RF amplifier based upon the amplitude correction signal.
A power amplifier controller circuit for controlling a power amplifier, the power amplifier coupled to receive and amplify an input signal to generate an output signal, the power amplifier controller circuit comprising:
- means for generating an amplitude correction signal indicative of an amplitude difference between an amplitude of the input signal and an attenuated amplitude of the output signal in an amplitude control loop;
- means for reducing an action of the amplitude control loop during rapid amplitude changes in the input signal;
- and
- means for adjusting a supply voltage or bias to the RF amplifier based upon the amplitude correction signal.
Dependencies are inferred from the claim text.