DocumentCode
1224197
Title
Precise 90° quadrature current-controlled oscillator tunable between 50-130 MHz
Author
Linares-Barranco, B. ; Serrano-Gotarredona, T. ; Ramos-Martos, J. ; Ceballos-Cáceres, J. ; Mora, J. Miguel ; Linares-Barranco, A.
Author_Institution
Inst. de Microelectron. de Sevilla, Spain
Volume
39
Issue
11
fYear
2003
fDate
5/29/2003 12:00:00 AM
Firstpage
823
Lastpage
825
Abstract
A VLSI continuous time sinusoidal OTA-C quadrature oscillator fabricated in a standard double-poly 0.8 μm CMOS process is presented. The oscillator is tunable in the frequency range from 50-130 MHz. The two phases produced by the oscillator show an extremely low phase difference error (less than 2° over the whole frequency range). A novel current mode amplitude control scheme is developed that allows for very small amplitudes. Experimental results are provided.
Keywords
CMOS analogue integrated circuits; VHF oscillators; circuit tuning; continuous time systems; current-mode circuits; integrated circuit layout; network topology; variable-frequency oscillators; 0.8 micron; 50 to 130 MHz; 90° quadrature current-controlled oscillator; VLSI continuous time sinusoidal OTA-C quadrature oscillator; current mode amplitude control scheme; double-poly 0.8 μm CMOS process; low phase difference error; oscillator phases; tunable oscillator;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:20030558
Filename
1207215
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