Dynamic loadline power amplifier with baseband linearization
AssigneeRF Micro Devices, Inc.
InventorsAndrew F. Folkmann, Ramon Antonio Beltran Lizarraga
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Abstract
Radio frequency (RF) amplification devices and methods of amplifying RF signals are disclosed. In one embodiment, an RF amplification device includes a control circuit and a Doherty amplifier configured to amplify an RF signal. The Doherty amplifier includes a main RF amplification circuit and a peaking RF amplification circuit. The control circuit is configured to activate the peaking RF amplification circuit in response to the RF signal reaching a threshold level. In this manner, the activation of the peaking RF amplification circuit can be precisely controlled.
Claims21
A radio frequency (RF) amplification device comprising:
- a Doherty amplifier configured to amplify an RF signal, wherein the Doherty amplifier comprises a main RF amplification circuit and a peaking RF amplification circuit;
- and
- a control circuit configured to activate the peaking RF amplification circuit in response to a signal level of the RF signal reaching a threshold level.
A method of amplifying an RF signal comprising:
- activating a main RF amplification circuit in a Doherty amplifier so that the main RF amplification circuit amplifies the RF signal while a peaking RF amplification circuit in the Doherty amplifier is deactivated;
- detecting a signal level of the RF signal;
- and
- activating the peaking RF amplification circuit in response to the signal level of the RF signal reaching a threshold level.
Dependencies are inferred from the claim text.