A Design of CMOS Class-E Power Amplifier with Phase Correction for Envelope Elimination and Restoration (EER)/Polar Systems

Wen-An TSOU  Wen-Shen WUEN  Kuei-Ann WEN  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E93-C   No.1   pp.128-131
Publication Date: 2010/01/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E93.C.128
Print ISSN: 0916-8516
Type of Manuscript: BRIEF PAPER
Category: Electronic Circuits
Keyword: 
envelope elimination and restoration (EER),  polar system,  class-E power amplifier,  orthogonal frequency division multiplexing (OFDM),  

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Summary: 
A circuit technique to correct Vdd/PM distortion and improve efficiency as supply modulation of cascode class-E PAs has been proposed. The experimental result shows that the phase distortion can be improved from 20 degrees to 5 degrees. Moreover, a system co-simulation result demonstrated that the EVM can be improved from -17 dB to -19 dB.