CMOS PA inducing a Leakage Signal for Mobile WiMAX
نویسنده
چکیده
A dynamic bias technology is proposed to meet linearity standards at high-power levels and simultaneously reduce power consumption at low-power output levels for a mobile WiMAX terminal application. The dynamic bias circuit induces voltage via the current from the source port of the final active stage, and makes the bias operate the PA dynamically as the output power level is increased. The fabricated PA complies with the spurious emission of WiMAX standards up to 20dBm with an improvement in average power usage efficiency of a factor of 5.21. The power amplifier is designed into a chip size of 870 x 1050μm with 0.18μm CMOS technology. The reliability is verified through a continuous P1dB transmission of 72 hours within a variation range of ±0.6dB. Key-Words: CMOS PA, Efficiency, Linear PA, Dynamic Bias, Microwave Amplifier, Mobile-WiMAX
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