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Design of a Voltage Controlled Oscillator for Galileo/GPS Receiver
Linköping University, Department of Electrical Engineering. Linköping University, The Institute of Technology.
2012 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The main aim of this thesis is to implement a voltage-controlled oscillator for a Galileo/GPS receiver with a center frequency of 1.5 GHz in 150 nm CMOS process. As the designed VCO has to be integrated in a phase locked loop, VCO gain is selected high enough for the PLL to lock even with process variations. A new state of art architecture called double harmonic tuned VCO is selected and designed for this GPS application. It uses a complex combination of inductors and capacitors to reduce phase-noise of the VCO by suppressing second harmonic oscillations in the tail node of VCO.

The designed VCO shows significant improvement in phase-noise performance compared to a normal LC tank VCO by reducing phase-noise around 4 dBc/Hz. The VCO has a phase-noise of -128 dBc/Hz at 1 MHz offset from center frequency with a power consumption of 5 mW and a tuning range of about 257 MHz for a 1 V tuning voltage range. 

Place, publisher, year, edition, pages
2012. , 65 p.
Keyword [en]
VCO LC tank Harmonic tuned harmonic
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
URN: urn:nbn:se:liu:diva-76279ISRN: LiTH-ISY-EX--11/4533--SEOAI: diva2:513321
Subject / course
Electronics Systems
Available from: 2012-04-18 Created: 2012-04-02 Last updated: 2012-04-18Bibliographically approved

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Other Electrical Engineering, Electronic Engineering, Information Engineering

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