Abstract
This brief proposes a complementary common gate frequency doubler with a cross-coupling technique for conversion gain enhancement. The proposed frequency doubler enables a low-power and high-conversion-gain operation by implementing a current-reuse technique through a complementary architecture and a transconductance enhancement technique based on cross-coupling. The cross-coupling technique increases the effective input voltage by two times, resulting in a four-fold increase in the conversion gain. In this manner, the proposed technique can achieve a high conversion gain with low power consumption. A prototype frequency doubler is fabricated in a 28-nm CMOS SOI. Measurement results show a peak conversion gain of −1.41 dB at an output frequency of 79 GHz with a power consumption of 9.23 mW.
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