Analog Integrated Circuits And Signal Processing, ( ISI ), Volume (68), No (2), Year (2011-5) , Pages (299-305)

Title : ( CMOS second-harmonic quadrature voltage controlled oscillator using substrate for coupling )

Authors: mohamad jafar hemati , Sasan Naseh ,

Access to full-text not allowed by authors

Citation: BibTeX | EndNote

In this work, a new circuit configuration for second-harmonic quadrature voltage controlled oscillator (QVCO) with CMOS technology is proposed. The proposed QVCO is made by coupling two identical cross-connected VCOs. The coupling elements (two resistors and two capacitors) do not increase the power consumption of the core VCOs and do not disturb the resonant frequency of the tank circuit in the core VCOs and also, according to the simulations the coupling elements do not adversely affect the phase noise. The role of the substrate terminal of cross-connected MOSFETs of the core oscillators as common mode nodes is demonstrated. Using this node for coupling makes it possible to eliminate the tail transistors in the core oscillators and therefore the circuit can operate with supply voltages as low as 0.5 V. Using the same method to couple more than two core oscillators, results in a multiphase VCO.

Keywords

, Keywords Common mode node , Cross-connected LC oscillator , Phase noise , Quadrature oscillator , Second-harmonic ,
برای دانلود از شناسه و رمز عبور پرتال پویا استفاده کنید.

@article{paperid:1023749,
author = {Hemati, Mohamad Jafar and Naseh, Sasan},
title = {CMOS second-harmonic quadrature voltage controlled oscillator using substrate for coupling},
journal = {Analog Integrated Circuits And Signal Processing},
year = {2011},
volume = {68},
number = {2},
month = {May},
issn = {0925-1030},
pages = {299--305},
numpages = {6},
keywords = {Keywords Common mode node ; Cross-connected LC oscillator ; Phase noise ; Quadrature oscillator ; Second-harmonic ; Substrate},
}

[Download]

%0 Journal Article
%T CMOS second-harmonic quadrature voltage controlled oscillator using substrate for coupling
%A Hemati, Mohamad Jafar
%A Naseh, Sasan
%J Analog Integrated Circuits And Signal Processing
%@ 0925-1030
%D 2011

[Download]