A DC-21 GHz low imbalance active balun using darlington cell technique for high speed data communications

Shou Hsien Weng, Hong Yeh Chang, Chau Ching Chiong

研究成果: 雜誌貢獻期刊論文同行評審

25 引文 斯高帕斯(Scopus)

摘要

A dc-21 GHz low imbalance active balun using a 2 μInGaP/GaAs HBT process is presented in this letter for high speed data communications. A Darlington cell is adopted to enhance 3 dB bandwidth of the proposed active balun. A feedback capacitor is designed to compensate the phase error between differential output ports caused by the different number of stages. The proposed active balun achieves a broad bandwidth of 21 GHz, an average small signal gain of 2.5dB, a maximum amplitude imbalance of 1.2 dB, and a phase error of less than 5̊ The measured group delays of the balun are lower than 30 ps with low variation. Moreover, an eye diagram with a pseudorandom bit stream of up to 12.5 Gbps is presented. The active balun is appropriate for high speed data communications due to its low imbalance and group delay.

原文???core.languages.en_GB???
文章編號5290007
頁(從 - 到)728-730
頁數3
期刊IEEE Microwave and Wireless Components Letters
19
發行號11
DOIs
出版狀態已出版 - 11月 2009

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