標題: Low-Phase-Noise SiGe HBT VCOs Using Trifilar-Transformer Feedback
作者: Meng, Chinchun
Syu, Jin-Siang
Tseng, Sheng-Che
Chang, Yu-Wen
Huang, Guo-Wei
電信工程研究所
Institute of Communications Engineering
關鍵字: SiGe heterojunction bipolar transistor (HBT);trifilar transformer;voltage controlled oscillator (VCO);phase noise
公開日期: 2008
摘要: The SiGe heterojunction bipolar transistor (HBT) voltage controlled oscillators (VCOs) using trifilar-transformer feedback at emitters, bases and collectors are demonstrated. The integrated trifilar transformer can allow dual voltage swings across the collectors and emitters of a cross-coupled differential pair and separate the bias between bases and collectors to optimize the output power. The tank inductance is also improved by the mutual coupling of the trifilar transformer. Thus, 191 dBc/Hz FOM (figure of merit) is achieved and is comparable to that of the state-of-the-art VCO.
URI: http://hdl.handle.net/11536/2974
ISBN: 978-1-4244-1780-3
ISSN: 0149-645X
期刊: 2008 IEEE MTT-S International Microwave Symposium Digest, Vols 1-4
起始頁: 249
結束頁: 252
Appears in Collections:Conferences Paper