Quadrature combined doherty amplifiers
AssigneeSkyworks Solutions, Inc.
InventorsAleksey A. Lyalin, Philip John Lehtola, Bo Pan, Weimin Sun
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Abstract
Apparatus and methods for quadrature combined Doherty amplifiers are provided herein. In certain embodiments, a separator is used to separate a radio frequency (RF) input signal into a plurality of input signal components that are amplified by a pair of Doherty amplifiers operating in quadrature. Additionally, a combiner is used to combine a plurality of output signal components generated by the pair of Doherty amplifiers, thereby generating an RF output signal exhibiting quadrature balancing.
Claims20
A radio frequency system comprising:
- a separator configured to separate a radio frequency input signal into a first pair of input signal components and a second pair of input signal components having a quadrature phase relationship with respect to the first pair of input signal components;
- a first Doherty amplifier configured to generate a first pair of amplified signal components based on amplifying the first pair of input signal components;
- a second Doherty amplifier configured to generate a second pair of amplified signal components based on amplifying the second pair of input signal components;
- and
- a combiner configured to generate a radio frequency output signal based on combining the first pair of amplified signal components and the second pair of amplified signal components.
A method of radio frequency signal amplification, the method comprising:
- separating a radio frequency input signal into a first pair of input signal components and a second pair of input signal components using a separator, the second pair of input signal components having a quadrature phase relationship with respect to the first pair of input signal components;
- amplifying the first pair of input signal components to generate a first pair of amplified signal components using a first Doherty amplifier;
- amplifying the second pair of input signal components to generate a second pair of amplified signal components using a second Doherty amplifier;
- and
- combining the first pair of amplified signal components and the second pair of amplified signal components to generate a radio frequency output signal using a combiner.
A mobile device comprising:
- a transceiver configured to generate a radio frequency input signal;
- and
- a front end system including a power amplifier configured to amplify the radio frequency input signal to generate a radio frequency output signal, the power amplifier including a separator configured to separate the radio frequency input signal into a first pair of input signal components and a second pair of input signal components having a quadrature phase relationship with respect to the first pair of input signal components, a first Doherty amplifier configured to generate a first pair of amplified signal components based on amplifying the first pair of input signal components, a second Doherty amplifier configured to generate a second pair of amplified signal components based on amplifying the second pair of input signal components, and a combiner configured to generate the radio frequency output signal based on combining the first pair of amplified signal components and the second pair of amplified signal components.
Dependencies are inferred from the claim text.