Please use this identifier to cite or link to this item:
Title: Analysis of voltage controlled oscillator
Authors: Nguyen, Huy Thong.
Keywords: DRNTU::Engineering::Electrical and electronic engineering::Electronic circuits
Issue Date: 2013
Abstract: In this report, the design of Voltage Controlled Oscillator (VCO) is presented. Fundamental principles, phase noise and mechanisms of which noise converted into phase noise in VCO are discussed. Two important theories on phase noise are elaborated. One approach is based on Time Linear Invariant model, while the other theory is established on Time Linear Variant. The later model takes into account the time variance nature of the periodical signal to derive the phase noise of an oscillator, proposed the very important concepts of Impulse Sensitivity Function and impact of Noise current modulation. The Voltage Controlled Oscillator is designed for ISM frequency bands, Blue Tooth (2.40GHz—2.48GHz), or IEEE 802.11b,g(2.40GHz–2.48GHz for Europe and USA). It employs the NMOS cross-coupled structure. The simulation results show that the VCO consumes 1.8mW, tuning range from 2.40-2.48 GHz, and phase noise performance of -121 dBc/Hz @ 1MHz frequency offset. Figure of Merit of the design is calculated to be 186. Quadrature VCO is required for the direct conversion and image rejection transceivers. Recent developments of QVCO are reported. The biggest contribution of this project is the design of a novel structure for quadrature signal generation. The proposed topology consumes 3.8mW per oscillator, tuning range from 2.42-2.48 GHz, and phase noise performance of -130.5 dBc/Hz @ 1MHz frequency offset. Figure of Merit of the design is achieved at 192.5. This is among one of the highest FOM for QVCOs in literature, to be the best of the author’s knowledge.
Schools: School of Electrical and Electronic Engineering 
Rights: Nanyang Technological University
Fulltext Permission: restricted
Fulltext Availability: With Fulltext
Appears in Collections:EEE Student Reports (FYP/IA/PA/PI)

Files in This Item:
File Description SizeFormat 
  Restricted Access
Final Report8.29 MBAdobe PDFView/Open
Digital Receipt.pdf
  Restricted Access
Digital Receipt20.25 kBAdobe PDFView/Open

Page view(s)

Updated on Apr 12, 2024


Updated on Apr 12, 2024

Google ScholarTM


Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.