Multiphase Signal Generation Using Capacitive Coupling of LC-VCOs

Author

Dooghabadi, Malihe Zarre ; Naseh, Sasan

Author_Institution

Ferdowsi Univ., Mashhad

fYear

2007

fDate

11-14 Dec. 2007

Firstpage

1087

Lastpage

1090

Abstract

A method for multiphase signal generation by means of coupling several identical cross-connected LC-VCOs via capacitors is presented. An analysis is presented which shows that there is a 180/N degrees phase difference between the outputs when N identical oscillators are coupled to each other. Since there is no noise and power consumption introduced by the coupling capacitors, the circuit has a better phase noise performance and lower total power consumption than other similar multiphase oscillators. Simulation results for the oscillator designed with a 0.18 Â¿m CMOS technology are presented and compared with another similar multiphase oscillator.

Keywords

CMOS integrated circuits; capacitors; coupled circuits; signal generators; voltage-controlled oscillators; CMOS technology; LC-VCO; coupling capacitors; multiphase signal generation; size 0.18 mum; voltage-controlled oscillators; Capacitors; Circuit noise; Circuit simulation; Coupling circuits; Energy consumption; MOSFET circuits; Phase noise; Ring oscillators; Signal generators; Stripline;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Circuits and Systems, 2007. ICECS 2007. 14th IEEE International Conference on

Conference_Location

Marrakech

Print_ISBN

978-1-4244-1377-5

Electronic_ISBN

978-1-4244-1378-2

Type

conf

DOI

10.1109/ICECS.2007.4511183

Filename

4511183