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A fully integrated CMOS direct-conversion transmitter front-end for WiMAX
Authors:Ka Nang Leung  Yuen Sum Ng  Hua Chen
Affiliation:1. Department of Electronic Engineering , The Chinese University of Hong Kong , Shatin , Hong Kong knleung@ee.cuhk.edu.hk;3. Department of Electronic Engineering , The Chinese University of Hong Kong , Shatin , Hong Kong
Abstract:
A naturally commutated six-pulse cycloconverter working in the inverting mode is used to feed power to a single phase AC motor at 400 Hz. The motor is connected at the input side of the cycloconverter while the three-phase mains is connected at its output. Three-phase mains feeds power to the input side of the cycloconverter which is arranged as a tuned load at 400 Hz. The effect of the single-phase induction motor on system performance is discussed. The principle of voltage and frequency control for proper operation of the induction motor is presented. The results are experimentally verified.
Keywords:I/Q modulator  power amplifier  LC balun  transmitter  WiMAX
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