DocumentCode :
2256772
Title :
A CMOS low-noise low-power quadrature LC oscillator
Author :
Ebrahimi, Emad ; Naseh, Sasan
Author_Institution :
Eng. Dept., Ferdowsi Univ. of Mashhad, Mashhad, Iran
fYear :
2009
fDate :
24-27 May 2009
Firstpage :
1305
Lastpage :
1308
Abstract :
A new quadrature LC voltage-controlled oscillator circuit configuration for CMOS technology is presented. In the proposed circuit two identical cross-connected LC-VCOs are coupled together via the bulk of the cross-connected MOS transistors and the bulk of the MOS varactors. No additional components are needed for coupling the core oscillators. Therefore, no extra noise sources and power consumption are added to the circuit, which results in good phase noise and low power consumption. The circuit can operate with Vdd as low as 0.5 V. A linear analysis of the quadrature operation of the circuit is also provided. The same coupling scheme can be used for multiphase signal generation.
Keywords :
MOSFET; phase noise; signal generators; varactors; voltage-controlled oscillators; CMOS low-noise low-power quadrature LC oscillator; LC-VCO; MOS varactors; core oscillators; cross-connected MOS transistors; linear analysis; multiphase signal generation; phase noise; power consumption; quadrature circuit operation; voltage 0.5 V; voltage-controlled oscillator circuit configuration; Capacitors; Circuit noise; Coupling circuits; Energy consumption; Frequency conversion; MOSFETs; Phase noise; Resistors; Signal generators; Voltage-controlled oscillators; Low-noise; low-power; low-voltage; multiphase; quadrature LC voltage-controlled oscillators (LC-QVCO);
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Circuits and Systems, 2009. ISCAS 2009. IEEE International Symposium on
Conference_Location :
Taipei
Print_ISBN :
978-1-4244-3827-3
Electronic_ISBN :
978-1-4244-3828-0
Type :
conf
DOI :
10.1109/ISCAS.2009.5118003
Filename :
5118003
Link To Document :
بازگشت