A Voltage-controlled Varactorless Lc-tank Oscillator with a Transformer- Feedback Technique
نویسندگان
چکیده
A differential-voltage-controlled LC oscillator employs a gm-tuned technique instead of a varactor is presented, verified, and measured. The design was demonstrated in a standard 0.18m 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
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