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Linearized high efficiency Class E power amplifier for wireless communications

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5 Author(s)
Sowlati, T. ; Dept. of Electr. & Comput. Eng., Toronto Univ., Ont., Canada ; Greshishchev, Yuriy ; André T.Salama, C. ; Rabjohn, G.
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A linearized high efficiency Class E power amplifier for wireless communications is presented in this paper. It consists of a Class E power stage and a phase correcting feedback loop. The Class E power amplifier operating at 835 MHz delivers 443 mW to the load at a supply voltage of 2.4 V. The phase correcting feedback loop comprises novel limiting amplifier, phase detector and phase shifter. The phase correcting feedback reduces the 30° phase distortion of the Class E amplifier down to 4°, resulting in a 20 dB reduction in adjacent channel interference. The total efficiency of the linearized Class E power amplifier is 65%

Published in:

Custom Integrated Circuits Conference, 1996., Proceedings of the IEEE 1996

Date of Conference:

5-8 May 1996