A low power, eight-phase LC-ring oscillator for clock and data recovery application

Author

Parkalian, Nina ; Hajsadeghi, Khosrow

Author_Institution

Dept. of Electr. Eng., Sharif Univ. of Technol., Tehran, Iran

fYear

2012

fDate

3-4 Sept. 2012

Firstpage

1

Lastpage

3

Abstract

A four stage LC-ring oscillator is presented. Eight different phases are generated in which there in 45 degrees phase difference between consecutive outputs and direction of phases is defined. Nmos capacitors in parallel with constant capacitors are used for coupling between stages. The control voltage is applied to Pmos varactors to adjust the oscillation frequency. The advantages of this structure are the rather small inductors size, low power consumption, and tuning curve linearity. The proposed structure is simulated in 0.18um CMOS technology. Power consumption for each stage is 4.8mW from a 1.8B supply. The proposed VCO has a phase noise of -121dBc/Hz at 1MHz offset from the center frequency of 5GHz and its gain is 380MHz/V.

Keywords

clock and data recovery circuits; microwave oscillators; power consumption; varactors; voltage-controlled oscillators; CMOS technology; NMOS capacitors; PMOS varactors; VCO; clock recovery application; control voltage; coupling; data recovery application; eight different phase; eight-phase LC-ring oscillator; frequency 5 GHz; power 4.8 mW; power consumption; size 0.18 mum; voltage 1.8 V; Phase locked loops; Varactors; Voltage-controlled oscillators; Welding; LC-Ring Oscillator; MOS Varactors; Phase Noise; Power Consumption; Tuning Range;

fLanguage

English

Publisher

ieee

Conference_Titel

Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMIC), 2012 Workshop on

Conference_Location

Dublin

Print_ISBN

978-1-4673-2950-7

Electronic_ISBN

978-1-4673-2948-4

Type

conf

DOI

10.1109/INMMIC.2012.6331943

Filename

6331943