Variable Class Characteristic Amplifier
First Claim
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8. A power amplifier comprising:
- a switch module, the switch module receiving an input signal and generating a switch module signal in accordance with the input signal;
a transformer module, the transformer module receiving the switch module signal and generating a transformer signal;
an output module, the output module receiving the transformer signal and generating an output signal, the output module including at least a capacitor and an inductor,wherein the power amplifier operates in a plurality of modes characteristic of a plurality of power amplifier classes and wherein the value of the capacitor is varied to effect operation between the modes for the input signal.
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Abstract
A power amplifier (PA) adjustably operable between two classes of operation. The range of operation lies in a range of operation between a conventional, linear, conjugately matched Class AB characteristic amplifier and a higher efficiency switching Class E characteristic amplifier. A circuit topology having a push-pull configuration that allows a Class E characteristic of operation.
55 Citations
45 Claims
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8. A power amplifier comprising:
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a switch module, the switch module receiving an input signal and generating a switch module signal in accordance with the input signal; a transformer module, the transformer module receiving the switch module signal and generating a transformer signal; an output module, the output module receiving the transformer signal and generating an output signal, the output module including at least a capacitor and an inductor, wherein the power amplifier operates in a plurality of modes characteristic of a plurality of power amplifier classes and wherein the value of the capacitor is varied to effect operation between the modes for the input signal. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A power amplifier comprising:
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a first switch module, the first switch module responsive to an input signal and generating a first switch module signal in accordance with the input signal; a second switch module arranged in a push-pull configuration with the first switch module, the second switch module responsive to the input signal and generating a second switch module signal in accordance with the input signal, the first and second switch module signals cooperating to generate a composite switch module signal; a transformer module, the transformer module receiving the composite switch module signal and generating a transformer signal; an output module, the output module receiving the transformer signal and generating an output signal, wherein the power amplifier operates in a plurality of modes characteristic of a plurality of power amplifier classes and wherein a configuration of the output module is varied to effect operation between the modes for the input signal. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A power amplifier comprising:
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a first switch module, the first switch module being responsive to an input signal and generating a first switch module signal in accordance with the input signal; a second switch module arranged in a push-pull configuration with the first switch module, the second switch module responsive to the input signal and generating a second switch module signal in accordance with the input signal, the first and second switch module signals cooperating to generate a composite switch module signal; a transformer module, the transformer module receiving the composite switch module signal and generating a transformer signal; an output module, the output module receiving the transformer signal and generating an output signal, the output module including a first capacitive element and an inductive element, wherein the power amplifier operates in a plurality of modes characteristic of a plurality of power amplifier classes and wherein the value of the capacitive element is varied to effect operation between the modes. - View Dependent Claims (1, 2, 3, 4, 5, 6, 7, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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28-1. The power amplifier of claim 24 wherein one of the plurality of modes is Class AB and another of the plurality of modes is Class E.
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34. A power amplifier comprising:
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a first switching device, the first switching device responsive to an input signal to generate a first switching device signal; a second switching device arranged in a push-pull configuration with the first switching device, the second switching device responsive to the input signal to generate a second switching device signal, the first and second switching device signals cooperating to generate a composite switching device signal; a transformer module, the transformer module receiving the composite switching device signal and generating a transformer signal; an output module, the output module receiving the transformer signal and generating an output signal, the output module including a first capacitor and an inductor, wherein the power amplifier operates in a plurality of modes characteristic of one of Class AB or Class E power amplifier classes and wherein the value of the capacitor is varied to effect operation between the modes. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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Specification