A filtering technique to lower LC oscillator phase noise
Författare
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.
Publiceringsår
2001
Språk
Engelska
Sidor
1921-1930
Publikation/Tidskrift/Serie
IEEE Journal of Solid-State Circuits
Volym
36
Issue
12
Fulltext
- Available as PDF - 255 kB
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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