DocumentCode
1427220
Title
7-decade tuning range CMOS OTA-C sinusoidal VCO
Author
Serrano-Gotarredona, T. ; Linares-Barranco, B.
Author_Institution
Nat. Micoelectron. Centre, Seville, Spain
Volume
34
Issue
17
fYear
1998
fDate
8/20/1998 12:00:00 AM
Firstpage
1621
Lastpage
1622
Abstract
A new operational transconductance amplifier-capacitor (OTA-C) based sinusoidal voltage-controlled oscillator (VCO) has been designed and fabricated. The oscillation frequency of which can be tuned from 74 mHz to 1 MHz. The VCO uses a new OTA whose transconductance is adjusted by using a set of special current mirrors. These current mirrors operate in weak inversion and their gain can be controlled continuously through a gate voltage over many decades. This is the first report of such a wide tuning range for CMOS sinusoidal oscillators. Experimental results are provided
Keywords
CMOS analogue integrated circuits; circuit tuning; operational amplifiers; voltage-controlled oscillators; 74 mHz to 1 MHz; CMOS OTA-C sinusoidal VCO; current mirror; operational transconductance amplifier-capacitor; tuning range; voltage-controlled oscillator;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:19981200
Filename
715248
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