DocumentCode
1211984
Title
Varactor characteristics, oscillator tuning curves, and AM-FM conversion
Author
Hegazi, Emad ; Abidi, Asad A.
Author_Institution
Dept. of Electr. Eng., Univ. of California, Los Angeles, CA, USA
Volume
38
Issue
6
fYear
2003
fDate
6/1/2003 12:00:00 AM
Firstpage
1033
Lastpage
1039
Abstract
A simple analysis relates the small-signal specification of a varactor´s capacitance to an oscillator´s tuning curve. The notion of an effective capacitance across the amplitude of oscillation is introduced. The analysis also explains how the varactor converts AM noise on the oscillation into FM, which is phase noise. The analysis is experimentally validated.
Keywords
circuit tuning; phase noise; radiofrequency integrated circuits; radiofrequency oscillators; varactors; voltage-controlled oscillators; AM noise; AM-FM conversion; FM noise; amplitude of oscillation; differential LC oscillator; oscillator tuning curves; phase noise; small-signal specification; tuning curve; varactor characteristics; voltage-controlled oscillator; Capacitance; Circuits; Frequency; Phase noise; Steady-state; Tail; Tuning; Varactors; Voltage control; Voltage-controlled oscillators;
fLanguage
English
Journal_Title
Solid-State Circuits, IEEE Journal of
Publisher
ieee
ISSN
0018-9200
Type
jour
DOI
10.1109/JSSC.2003.811968
Filename
1202006
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