Linearized switch-based power amplifier

Details Linearized switch-based power amplifier Linearized switch-based power amplifier

2007-12-18

2007-12-18

Payne, David C. (Department: 2611)

Pulse or digital communications

Transmitters

Antinoise or distortion

C330S149000, C332S152000, C341S143000, C375S242000, C375S247000, C375S295000, C455S114300

Reexamination Certificate

active

10474726

ABSTRACT:
A power amplifier comprises a level-discretization modulator (210) and a mixing and amplifying stage (225), in combination with a properly designed negative feedback path. The feedback path forms an error compensation loop together with a properly selected forward path. The forward path includes at least the mixing and amplifying stage (225), which provides frequency up-conversion to the radio frequency band and switch-based amplification. The negative feedback path includes a down-conversion mixer (280) for down-conversion to the initial frequency band, and compensates for distortion caused by components of the forward path.

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Hans Ertl, Johann Kolar, Franz Zach; Basic considerations and topologies of switched-mode assisted linear power amplifiers; Feb. 1977; IEEE Transactions on Industrial Electronics, vol. 44. No. 1; pp. 116-123.

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