DocumentCode
2416017
Title
A Process and Temperature Compensated Two-Stage Ring Oscillator
Author
Lakshmikumar, K.R. ; Mukundagiri, V. ; Gierkink, S.L.J.
Author_Institution
Conexant Syst., Red Bank
fYear
2007
fDate
16-19 Sept. 2007
Firstpage
691
Lastpage
694
Abstract
Local positive feedback in a delay element enables a ring oscillator with only two stages to oscillate and produce quadrature clocks. Routh-Hurwitz´s criterion is applied to prove that such a structure can oscillate. An internally generated power supply from a constant-gm bias keeps the free running frequency to within plusmn 5% from -40 to 125degC over process variations. The 1.25 GHz oscillator in 0.13 mum CMOS draws 3.4 mA and has a phase noise of -88 dBc/Hz at 1MHz offset.
Keywords
UHF oscillators; circuit feedback; compensation; low-power electronics; synchronisation; current 3.4 mA; delay element; frequency 1.25 GHz; local positive feedback; quadrature clocks; size 0.13 mum; temperature -40 C to 125 C; temperature compensation; two-stage ring oscillator; Circuits; Clocks; Delay; Frequency; Latches; Phase locked loops; Ring oscillators; Temperature; Transfer functions; Tuning;
fLanguage
English
Publisher
ieee
Conference_Titel
Custom Integrated Circuits Conference, 2007. CICC '07. IEEE
Conference_Location
San Jose, CA
Print_ISBN
978-1-4244-1623-3
Electronic_ISBN
978-1-4244-1623-3
Type
conf
DOI
10.1109/CICC.2007.4405826
Filename
4405826
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