Analysis and Design of a Phase-Tunable Source Injection-Coupled LC Quadrature Oscillator

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• 作者：Hojat Ghonoodi ; Hossein Miar Naimi
• 关键词：Voltage ; controlled oscillator (VCO) ; Quadrature accuracy ; RF CMOS ; Phase noise
• 刊名：Circuits, Systems, and Signal Processing
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：35
• 期：3
• 页码：731-752
• 全文大小：1,455 KB
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• 作者单位：Hojat Ghonoodi (1)
  Hossein Miar Naimi (1)
  
  1. Babol University of Technology, P.Box 484, Babol, Iran
  
• 刊物类别：Engineering
• 刊物主题：Electronic and Computer Engineering
  
• 出版者：Birkh盲user Boston
• ISSN：1531-5878

文摘

This paper presents the design and analysis of phase-tunable injection-coupled quadrature oscillator (PT-IC-QO). Like other LC QOs, the mismatches between LC tanks are the main source of phase error in this oscillator. Using tail current in network coupling is novel approach to design new IC-QO. One of the advantages using added extra tail current in coupling network is control of coupling factor and also that it drastically reduces supply noise over classic IC-QO. Analysis and simulation result show that phase error can be controlled and cancelled simply by using tunable tail current in network coupling while that is difficultly controlled in the previse work. The basic idea of the presented design to reduce phase error due to tank mismatches is its compensation with an intentional mismatch between \(I\hbox {/}Q\)-side injection current. Based on the equations, a new tunable source-injected QO is proposed which is able to cancel the phase errors up to \(\pm 20^\circ \), without undesirable impact on phase noise. To evaluate the proposed analysis and consequent designed quadrature oscillator, a 5.4-GHz CMOS PT-QO is designed and simulated using the practical \(0.18\,\upmu \hbox {m}\) TSMC CMOS technology. Keywords Voltage-controlled oscillator (VCO) Quadrature accuracy RF CMOS Phase noise