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A three stage transformer coupled amplifier for operation in the 57-64 GHz band is presented. The amplifier uses differential capacitive neutralization and low loss transformers to achieve a gain of 30 dB at 61 GHz. The amplifier has an output compression point of 7.5 dBm and a power added efficiency at 1dB compression of 9% at 57 GHz. The amplifier has been fabricated in digital CMOS and occupies...
A novel Marchand balun-based parallel power combiner suitable for a 60-GHz CMOS power amplifier is proposed. It improves the power efficiency by solving the issues of the phase difference of the signals to be combined and the low coupling factor of the on-chip balun in scaled CMOS technologies. The power amplifier using the proposed power combiner is fabricated in a 90 nm CMOS process with 1.2 V supply...
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