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A voltage‐controlled varactorless LC‐tank oscillator with a transformer‐feedback technique
Author(s) -
Yang ChingYuan,
Tsai MengTing
Publication year - 2007
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.22861
Subject(s) - varicap , dbc , phase noise , electrical engineering , voltage controlled oscillator , microwave , transformer , voltage , cmos , electronic oscillator , offset (computer science) , frequency offset , materials science , lc circuit , optoelectronics , engineering , physics , electronic engineering , computer science , telecommunications , capacitor , electrode , capacitance , orthogonal frequency division multiplexing , quantum mechanics , programming language , channel (broadcasting)
A differential‐voltage‐controlled LC oscillator employs a g m ‐tuned technique instead of a varactor is presented, verified, and measured. The design was demonstrated in a standard 0.18‐μm CMOS process. The oscillator can operate at the range of 4.73–5.05 GHz under a 1.8‐V supply voltage. The measured phase noise is −100.76 dBc/Hz at 100‐kHz frequency offset and −121.53 dBc/Hz at 1‐MHz frequency offset away from the 4.73‐GHz carrier with power consumption of 6.48 mW. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2808–2810, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22861