科研之友
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摘要
A digital envelope combiner (DEC) technique that employs an open-loop transformer-based combination of a bank of two-level polar switching power amplifiers to generate wide-bandwidth modulated radio frequency signals with simultaneously high efficiency and good linearity is presented. The application of the DEC is illustrated by the design and simulation-based verification of a 2.4-GHz 0.13-mu m complementary metal-oxide-semiconductor power amplifier that achieves EVM < -25 dBc, ACPR < -40 dBc, and an average drain efficiency of 37% while generating a 16.25-MHz-bandwidth 8.9-dB-peak-to-average signal power ratio (PAR) 64-state quadrature amplitude modulation signal.
- 出版日期2010-4
