Title :
A New Low-Power High Frequency CMOS Quadrature LC-VCO
Author :
Wang, Chunhua ; Yang, Changyong
Author_Institution :
Sch. of Comput. & Commun., Hunan Univ., Changsha
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;
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
DOI :
10.1109/WiCom.2008.562
