Method and apparatus for power amplifier linearization
AssigneeNewlans, Inc.
InventorDev V. Gupta
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Abstract
In an embodiment, a circuit includes a variable group delay configured to delay a wideband input signal to obtain a delayed input signal; a wideband operational amplifier configured to determine an error signal based on a difference between the delayed input signal and a linearized power amplifier output; a feedback amplifier configured to amplify the error signal to obtain an amplified error signal; and a directional combiner configured to combine the amplified error signal with the power amplifier output to obtain the linearized power amplifier output.
Claims7
A circuit comprising:
- a variable group delay configured to delay a wideband input signal to obtain a delayed input signal;
- a wideband operational amplifier configured to determine an error signal based on a difference between the delayed input signal and a linearized power amplifier output;
- a feedback amplifier configured to amplify the error signal to obtain an amplified error signal;
- and
- a directional combiner configured to combine the amplified error signal with the power amplifier output to obtain the linearized power amplifier output.
A method of linearizing the output of a power amplifier, the method comprising:
- delaying a wideband input signal to obtain a delayed input signal;
- determining an error signal based on a difference between the delayed input signal and a linearized power amplifier output;
- amplifying the error signal to obtain an amplified error signal;
- and
- combining the amplified error signal with the power amplifier output to obtain the linearized power amplifier output.
Dependencies are inferred from the claim text.