Amplifier mode switch
First Claim
Patent Images
1. A power amplifier comprising:
- a main amplifier having an output coupled to a Doherty combining network;
an auxiliary amplifier having an output coupled to the Doherty combining network;
a splitter that splits a RF input into a first input provided to the main amplifier and a second input delayed by one/quarter wavelength provided to the auxiliary amplifier; and
a bias control coupled to the auxiliary amplifier for controllably switching operation of the power amplifier between a balanced class AB mode of operation and a Doherty mode of operation.
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Abstract
A power amplifier includes a main amplifier having a first output. An auxiliary amplifier has a second output coupled to the first output. A splitter splits a RF input into a first input provided to the main amplifier and a second input delayed by one/quarter wavelength provided to the auxiliary amplifier. A bias control is coupled to the auxiliary amplifier for controllably switching operation of the power amplifier between two different modes of operation.
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Citations
20 Claims
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1. A power amplifier comprising:
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a main amplifier having an output coupled to a Doherty combining network; an auxiliary amplifier having an output coupled to the Doherty combining network; a splitter that splits a RF input into a first input provided to the main amplifier and a second input delayed by one/quarter wavelength provided to the auxiliary amplifier; and a bias control coupled to the auxiliary amplifier for controllably switching operation of the power amplifier between a balanced class AB mode of operation and a Doherty mode of operation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A power amplifier comprising:
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a main amplifier having a first output; an auxiliary amplifier having a second output coupled to the first output; a splitter that splits a RF input into a first input provided to the main amplifier and a second input provided to the auxiliary amplifier; and means for controllably switching operation of the power amplifier between a balanced class AB mode of operation and a Doherty mode of operation. - View Dependent Claims (12, 13, 14)
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15. A method of switching modes of operation of a power amplifier, the method comprising:
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providing a DC bias to a main amplifier having a first output; providing a DC bias to an auxiliary amplifier having a second output coupled to the first output; and controlling the DC bias provided to the auxiliary amplifier to controllably switch modes of operation of the power amplifier between a balanced class AB mode of operation and a Doherty mode of operation. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification