A New Low-Power High Frequency CMOS Quadrature LC-VCO

Author

Wang, Chunhua ; Yang, Changyong

Author_Institution

Sch. of Comput. & Commun., Hunan Univ., Changsha

fYear

2008

fDate

12-14 Oct. 2008

Firstpage

1

Lastpage

4

Abstract

A new circuit topology for quadrature voltage- controlled oscillator (QVCO) is presented and demonstrated on a 4.5-GHz CMOS differential oscillator. In the proposed circuit two identical negative-resistance oscillators are coupled to each other via diode, in such a way that quadrature differential signals are generated with low voltage and low power. The QVCO has a phase noise of-113.8 dBc/Hz at 1 MHz offset while dissipating 2.5 mA from a 0.8-V supply, which corresponds to a FOM of-183.8 dB.

Keywords

CMOS integrated circuits; low-power electronics; negative resistance circuits; network topology; voltage-controlled oscillators; CMOS differential oscillator; circuit topology; low-power high frequency CMOS quadrature LC-VCO; negative-resistance oscillators; quadrature voltage-controlled oscillator; Circuit topology; Coupling circuits; Diodes; Frequency; Low voltage; Phase noise; Power generation; Signal generators; Voltage control; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications, Networking and Mobile Computing, 2008. WiCOM '08. 4th International Conference on

Conference_Location

Dalian

Print_ISBN

978-1-4244-2107-7

Electronic_ISBN

978-1-4244-2108-4

Type

conf

DOI

10.1109/WiCom.2008.562

Filename

4678470