RF Power Amplifiers with Linearization
3 Assignments
0 Petitions
Accused Products
Abstract
Designs and techniques associated with power amplifiers for amplifying RF signals to provide variable power amplification and improved linearity in various RF amplification circuits, including power amplifiers operated under the power back-off conditions.
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Citations
85 Claims
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1-37. -37. (canceled)
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38. A variable power amplifier, comprising:
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a plurality of cells, each cell having at least one bank of transistors; and a control circuit for turning on and off the plurality of cells so as to adjust an output power level of the variable power amplifier to maintain linear operation of the variable power amplifier. - View Dependent Claims (39, 40, 41, 42, 56, 57, 58, 59, 60, 61, 62, 63, 64)
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67. A method for a variable power amplifier, comprising:
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detecting an input signal at an input port of a variable power amplifier; determining a feedback signal to adjust an output power level of the variable power amplifier to maintain linear operation; generating a feedback signal in response to detection of the input signal; and turning on at least one cell of the variable power amplifier in response to the feedback signal, the cell having switchable transistor banks. - View Dependent Claims (68, 69, 70, 71, 72, 73, 74, 75)
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76. A system, comprising:
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an input port to receive an analog signal; switchable transistor banks to amplify the analog signal; a control circuit coupled to the input port, wherein the control circuit generates a feedback control signal for the amplifier in response to a received analog signal; and a bias control circuit coupled to the amplifier to selectively turn on the switchable transistor banks in response to the feedback control signal. - View Dependent Claims (77, 78, 79, 80, 81, 82, 83, 84, 85)
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Specification