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Second harmonic terminations for AM-AM and AM-PM suppression
Second harmonic terminations for AM-AM and AM-PM suppression
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机译：用于AM-AM和AM-PM抑制的二次谐波终端
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摘要
Methods and devices for improving AM-AM and AM-PM performance of an RF amplifier are presented. According to one aspect, input and output harmonic terminations coupled to the input and output of the amplifier are tuned at frequencies near to, but different than, a second harmonic frequency of an RF signal to be amplified. Improved AM-AM and AM-PM performance is obtained when i) the input harmonic termination is tuned at a frequency that is below the second harmonic frequency and the output harmonic termination is tuned at a frequency that is above the second harmonic frequency, and ii) the input harmonic termination is tuned at a frequency that is farther away from the second harmonic frequency than the frequency used for tuning of the output harmonic termination.
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