US Patent Application 18353337. RF POWER AMPLIFIER SYSTEM WITH MULTIPLE SUPPLY MODULATORS simplified abstract

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RF POWER AMPLIFIER SYSTEM WITH MULTIPLE SUPPLY MODULATORS

Organization Name

Murata Manufacturing Co., Ltd.


Inventor(s)

James Garrett of Windham NH (US)

Sri Harsh Pakala of Chandler AZ (US)

Brendan Metzner of North Billerica MA (US)

Ivan Duzevik of Portland ME (US)

David J. Perreault of Cambridge MA (US)

John R. Hoversten of Arlington MA (US)

Yevgeniy A. Tkachenko of Belmont MA (US)

RF POWER AMPLIFIER SYSTEM WITH MULTIPLE SUPPLY MODULATORS - A simplified explanation of the abstract

This abstract first appeared for US patent application 18353337 titled 'RF POWER AMPLIFIER SYSTEM WITH MULTIPLE SUPPLY MODULATORS

Simplified Explanation

The patent application describes circuits and techniques to improve the efficiency of radio-frequency amplifiers, specifically power amplifiers.

  • The technique used is called "supply modulation" or "drain modulation" or "collector modulation".
  • Supply voltages provided to the amplifiers are adjusted dynamically based on the RF signal being synthesized.
  • The supply voltage can be adjusted among discrete voltage levels or continuously on a short time scale for maximum efficiency improvements.
  • The supply voltages can also be adapted to accommodate longer-term changes in the desired RF envelope, such as adjusting transmitter output strength to minimize errors in data transfer.
  • This innovation aims to optimize the efficiency of RF amplifiers and adapt to variations in RF traffic.


Original Abstract Submitted

Described are circuits and techniques to increase the efficiency of radio-frequency (rf) amplifiers including rf power amplifiers (PAs) through “supply modulation” (also referred to as “drain modulation” or “collector modulation”), in which supply voltages provided to rf amplifiers is adjusted dynamically (“modulated”) over time depending upon the rf signal being synthesized. For the largest efficiency improvements, a supply voltage can be adjusted among discrete voltage levels or continuously on a short time scale. The supply voltages (or voltage levels) provided to an rf amplifier may also be adapted to accommodate longer-term changes in desired rf envelope such as associated with adapting transmitter output strength to minimize errors in data transfer, for rf “traffic” variations.

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