A low-noise low-power 4.6-GHz CMOS VCO with coupling effect reduced inductors

A fully integrated low phase noise 4.6-GHz voltage-controlled oscillator (VCO) is presented for low-voltage high-frequency wireless local area network (LAN) front-end system applications. The VCO is based on a differential negative resistance oscillator with the tail current source replaced by an in...

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Bibliographic Details
Published inInternational journal of electronics Vol. 94; no. 2; pp. 107 - 121
Main Authors Liou, W.-R., Chen, T.-H., Yeh, M.-L., Ho, J.-J.
Format Journal Article
LanguageEnglish
Published London Taylor & Francis Group 01.02.2007
Taylor & Francis
Subjects
Applied sciences
Circuit properties
Design. Technologies. Operation analysis. Testing
Electric, optical and optoelectronic circuits
Electronic circuits
Electronic equipment and fabrication. Passive components, printed wiring boards, connectics
Electronics
Exact sciences and technology
Integrated circuits
Magnetic devices
MOS varactor
Oscillators, resonators, synthetizers
Phase noise
Radio frequency
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Voltage control oscillator
Wireless LAN
Phase noise
Current source
High performance
Wireless LAN
Negative differential conductivity
Low noise circuit
Voltage controlled oscillator
Differential circuit
Radiofrequency
Inductor
Local network
Overvoltage
Guard ring
Low voltage
Power consumption
Carrier frequency
High voltage
Complementary MOS technology
Low-power electronics
High frequency
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Summary:A fully integrated low phase noise 4.6-GHz voltage-controlled oscillator (VCO) is presented for low-voltage high-frequency wireless local area network (LAN) front-end system applications. The VCO is based on a differential negative resistance oscillator with the tail current source replaced by an inductor. The inductor improves the phase noise of the oscillator and enables maximum voltage swing over the tank. A high-performance inductor with unclosed-loop guard ring is designed and used in this VCO design. The differential voltage-controlled oscillator is fabricated in a TSMC 0.18-µm one-poly-six-metal 1.5 V mixed signal radio frequency (RF) process. The measurement results show a power consumption of 4.3 mW. The phase noise is −91 dBc/Hz and −115 dBc/Hz at 100 KHz and 1 MHz offset from the carrier frequency, respectively.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0020-7217
1362-3060
DOI:10.1080/00207210601061258