Invention Grant
- Patent Title: Radio frequency power amplifier improvements using pre-distortion of an amplitude modulation power supply
- Patent Title (中): 射频功率放大器改进使用预失真的幅度调制电源
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Application No.: US12112006Application Date: 2008-04-30
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Publication No.: US07884681B1Publication Date: 2011-02-08
- Inventor: Nadim Khlat , Ruediger Bauder , David Reed , Baker P. Scott
- Applicant: Nadim Khlat , Ruediger Bauder , David Reed , Baker P. Scott
- Applicant Address: US NC Greensboro
- Assignee: RF Micro Devices, Inc.
- Current Assignee: RF Micro Devices, Inc.
- Current Assignee Address: US NC Greensboro
- Agency: Winthrow & Terranova, P.L.L.C.
- Main IPC: H03C1/00
- IPC: H03C1/00 ; H03C1/02 ; H03C1/06
Abstract:
Embodiments of the present invention include amplitude-modulated or polar-modulated radio frequency (RF) power amplifier circuitry, in which an envelope power supply input to an RF power amplifier is powered by a pre-distorted amplitude modulation (AM) power supply. The pre-distorted AM power supply receives an AM signal, which is then pre-distorted and amplified to provide an AM power supply signal to the RF power amplifier. The pre-distortion of the AM signal is used to improve the linearity, the efficiency, or both, of the RF power amplifier. The pre-distortion provides a feed-forward system, which may allow use of a reduced bandwidth pre-distorted AM signal to an AM power supply and a reduced bandwidth AM power supply, which may increase efficiency.
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