Title :
A Low-Phase Noise and High Output Swing RF LC-VCO in CMOS Technology
Author :
Ramiah, Harikrishnan ; Zulkifli, Tun Zainal Azni
Author_Institution :
RF Design Group, Univ. Sains Malaysia, Penang
Abstract :
This paper presents the design of a 1.8-V, 3.5GHz CMOS complementary cross-coupled LC-VCO designed for WLAN IEEE 802.11a, two step frequency up-conversion applications with integrated stacked planar inductor. The tuning range of the VCO spans from 3.38 GHz to 3.55 GHz achieved through a depletion mode pMOS based varactor and the corresponding core circuit current consumption is 2.5mA. Implemented in a 0.18mum standard CMOS process the VCO is integrated with a high gain cross-coupled open drain buffer and measures a close in 1/f3 phase noise of -57 dBc/Hz at 10 kHz of offset frequency. The far out phase noise, 1/f2 is -116 dBc/Hz at 1 MHz of offset frequency
Keywords :
1/f noise; CMOS integrated circuits; IEEE standards; microwave oscillators; phase noise; voltage-controlled oscillators; wireless LAN; 0.18 micron; 1.8 V; 1/f phase noise; 2.5 mA; 3.38 to 3.55 GHz; CMOS technology; RF LC-VCO; WLAN IEEE 802.11a; complementary cross-coupled LC-VCO; core circuit current consumption; depletion mode pMOS; frequency up-conversion; stacked planar inductor; CMOS process; CMOS technology; Circuit optimization; Inductors; Measurement standards; Phase noise; Radio frequency; Varactors; Voltage-controlled oscillators; Wireless LAN; LC-tank; Open drain buffer; Phase noise; RF CMOS; Voltage controlled oscillator (VCO);
Conference_Titel :
RF and Microwave Conference, 2006. RFM 2006. International
Conference_Location :
Putra Jaya
Print_ISBN :
0-7803-9745-2
Electronic_ISBN :
0-7803-9745-2
DOI :
10.1109/RFM.2006.331068
