A filtering technique to lower LC oscillator phase noise

Summary, in English

Based on a physical understanding of phase-noise mechanisms, a passive LC filter is found to lower the phase-noise factor in a differential oscillator to its fundamental minimum. Three fully integrated LC voltage-controlled oscillators (VCOs) serve as a proof of concept. Two 1.1-GHz VCOs achieve -153 dBc/Hz at 3 MHz offset, biased at 3.7 mA from 2.5 V. A 2.1-GHz VCO achieves -148 dBc/Hz at 15 MHz offset, taking 4 mA from a 2.7-V supply. All oscillators use fully integrated resonators, and the first two exceed discrete transistor modules in figure of merit. Practical aspects and repercussions of the technique are discussed.

• Författare: Emad Hegazi; Henrik Sjöland; Asad Abidi
• Avdelning/ar: Institutionen för elektro- och informationsteknik
• Publiceringsår: 2001
• Språk: Engelska
• Sidor: 1921-1930
• Publikation/Tidskrift/Serie: IEEE Journal of Solid-State Circuits
• Volym: 36
• Issue: 12
• Fulltext: - 255 kB; Download statistics
• Länkar: http://dx.doi.org/10.1109/4.972142
• Dokumenttyp: Artikel i tidskrift
• Förlag: IEEE - Institute of Electrical and Electronics Engineers Inc.
• Ämne: Electrical Engineering, Electronic Engineering, Information Engineering
• Nyckelord: UHF oscillators; passive filters; phase noise; voltage-controlled oscillators
• Status: Published
• Forskningsgrupp: Elektronikkonstruktion
• ISBN/ISSN/Övrigt: ISSN: 0018-9200