@inproceedings{8fd7f5a9f39447e396a07b2f25d908fa,
title = "Low-phase-noise SiGe HBT VCOs using trifilar-transformer feedback",
abstract = "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.",
keywords = "Phase noise, SiGe heterojunction bipolar transistor (HBT), Trifilar transformer, Voltage controlled oscillator (VCO)",
author = "Chin-Chun Meng and Syu, {Jin Siang} and Tseng, {Sheng Che} and Chang, {Yu Wen} and Huang, {Guo Wei}",
year = "2008",
month = dec,
day = "12",
doi = "10.1109/MWSYM.2008.4633150",
language = "English",
isbn = "9781424417810",
series = "IEEE MTT-S International Microwave Symposium Digest",
pages = "249--252",
booktitle = "2008 IEEE MTT-S International Microwave Symposium Digest, MTT",
note = "2008 IEEE MTT-S International Microwave Symposium Digest, MTT ; Conference date: 15-06-2008 Through 20-06-2008",
}