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A 2–40 GHz Active Balun Using 0.13 \mu{\rm m} CMOS Process

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4 Author(s)
Bo-Jiun Huang ; Dept. of Electr. Eng. & Grad., Nat. Taiwan Univ., Taipei ; Bo-Jr Huang ; Kun-You Lin ; Huei Wang

A 2 to 40 GHz broadband active balun using 0.13 mum CMOS technology is presented in this letter. Using two-stage differential amplified pairs, the active balun can achieve a wideband performance with the gain compensation technique. This active balun exhibits a measured small signal gain of 0 plusmn1, with the amplitude imbalances below 0.5 dB and the phase differences of 180 plusmn10deg from 2 to 40 GHz. The core active balun has a low power consumption of 40 mW, and a compact area of 0.8 mm x 0.7 mm. This proposed balun achieved the highest operation frequency, the widest bandwidth, and the smallest size among all the reported active baluns.

Published in:

Microwave and Wireless Components Letters, IEEE  (Volume:19 ,  Issue: 3 )