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Radio frequency CMOS amplifier with enhanced linearity and power efficiency
Radio frequency CMOS amplifier with enhanced linearity and power efficiency
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机译:具有增强的线性度和功率效率的射频CMOS放大器
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摘要
In general, the disclosure is directed to techniques for enhancing power efficiency and linearity in an RF power amplifier. In accordance with the invention, a combination of different class power amplifiers is implemented in a parallel configuration to overcome the trade-off that exists between power efficiency and linearity. In particular, a class A amplifier and a class B amplifier are arranged in parallel to produce a combined amplifier output for an input signal. With bias voltages set to achieve a desired operating ratio between the class A and class B amplifier, the combined amplifier can provide a high power gain over a larger input range. In addition, the class B amplifier can provide increased power efficiency for larger inputs.
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