Title :
A 2.2 GHz CMOS VCO with inductive degeneration noise suppression
Author :
Andreani, Pietro ; Sjoland, Henrik
Author_Institution :
Dept. of Appl. Electron., Lund Univ., Sweden
Abstract :
A 1.4 V, 9 mA monolithic LC-tank voltage-controlled oscillator (VCO) fabricated in a standard 0.35 μm CMOS process is presented. The VCO is tunable between 2.0 GHz and 2.37 GHz, and displays a phase noise between -140 dBc/Hz and -138 dBc/Hz at a 3 MHz offset frequency across the whole tuning range. This low phase noise is achieved through the use of an on-chip LC filter and an off-chip low frequency inductor, which totally remove the noise of the tail current source. The phase noise improvement due to the off-chip inductor is between 2 dB and 6 dB, increasing with higher oscillation frequencies
Keywords :
CMOS analogue integrated circuits; UHF integrated circuits; UHF oscillators; circuit tuning; field effect MMIC; integrated circuit noise; phase noise; voltage-controlled oscillators; 0.35 micron; 1.4 V; 2.0 to 2.37 GHz; 9 mA; CMOS VCO; LC-tank voltage-controlled oscillator; inductive degeneration noise suppression; off-chip low frequency inductor; on-chip LC filter; oscillation frequencies; phase noise; tail current source; tuning range; CMOS process; Displays; Filters; Frequency; Inductors; Low-frequency noise; Phase noise; Tail; Tuning; Voltage-controlled oscillators;
Conference_Titel :
Custom Integrated Circuits, 2001, IEEE Conference on.
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-6591-7
DOI :
10.1109/CICC.2001.929754
